WO2020095983A1 - O-置換セリン誘導体の製造方法 - Google Patents
O-置換セリン誘導体の製造方法 Download PDFInfo
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- WO2020095983A1 WO2020095983A1 PCT/JP2019/043626 JP2019043626W WO2020095983A1 WO 2020095983 A1 WO2020095983 A1 WO 2020095983A1 JP 2019043626 W JP2019043626 W JP 2019043626W WO 2020095983 A1 WO2020095983 A1 WO 2020095983A1
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- 0 *C[C@](C(OCc1ccccc1)=O)N Chemical compound *C[C@](C(OCc1ccccc1)=O)N 0.000 description 12
- VUNBZHYPHYZUEV-GFCCVEGCSA-N CC(C)(C)OC(N([C@H](CO1)C(OCc2ccccc2)=O)S1(=O)=O)=O Chemical compound CC(C)(C)OC(N([C@H](CO1)C(OCc2ccccc2)=O)S1(=O)=O)=O VUNBZHYPHYZUEV-GFCCVEGCSA-N 0.000 description 1
- JTZOGGJWJYOLSY-GFCCVEGCSA-N CC(C)(COC[C@H](C(OCc1ccccc1)=O)N)O Chemical compound CC(C)(COC[C@H](C(OCc1ccccc1)=O)N)O JTZOGGJWJYOLSY-GFCCVEGCSA-N 0.000 description 1
- CKAAQGMQYUQZQN-AWEZNQCLSA-N CC(C)CCOC[C@@H](C(OCc1ccccc1)=O)N Chemical compound CC(C)CCOC[C@@H](C(OCc1ccccc1)=O)N CKAAQGMQYUQZQN-AWEZNQCLSA-N 0.000 description 1
- ACPNSTGFBDTNJU-LLVKDONJSA-N C[C@H](C(OCc1ccccc1)=O)N(C(OC(C)(C)C)=O)S(O)(=O)=O Chemical compound C[C@H](C(OCc1ccccc1)=O)N(C(OC(C)(C)C)=O)S(O)(=O)=O ACPNSTGFBDTNJU-LLVKDONJSA-N 0.000 description 1
- AXJRBJZXEMXSPS-KRWDZBQOSA-N N[C@@H](CCOc1ccccc1)C(OCCc1ccccc1)=O Chemical compound N[C@@H](CCOc1ccccc1)C(OCCc1ccccc1)=O AXJRBJZXEMXSPS-KRWDZBQOSA-N 0.000 description 1
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- C07—ORGANIC CHEMISTRY
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- C07C269/00—Preparation of derivatives of carbamic acid, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C269/04—Preparation of derivatives of carbamic acid, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups from amines with formation of carbamate groups
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- C07—ORGANIC CHEMISTRY
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- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D307/38—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D307/40—Radicals substituted by oxygen atoms
- C07D307/42—Singly bound oxygen atoms
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- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C227/14—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof
- C07C227/18—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof by reactions involving amino or carboxyl groups, e.g. hydrolysis of esters or amides, by formation of halides, salts or esters
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- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C229/00—Compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C229/02—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton
- C07C229/04—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated
- C07C229/22—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated the carbon skeleton being further substituted by oxygen atoms
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- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C269/00—Preparation of derivatives of carbamic acid, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C269/06—Preparation of derivatives of carbamic acid, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups by reactions not involving the formation of carbamate groups
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C271/00—Derivatives of carbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C271/06—Esters of carbamic acids
- C07C271/08—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms
- C07C271/10—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms
- C07C271/22—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms to carbon atoms of hydrocarbon radicals substituted by carboxyl groups
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- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D291/00—Heterocyclic compounds containing rings having nitrogen, oxygen and sulfur atoms as the only ring hetero atoms
- C07D291/02—Heterocyclic compounds containing rings having nitrogen, oxygen and sulfur atoms as the only ring hetero atoms not condensed with other rings
- C07D291/04—Five-membered rings
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- C07D—HETEROCYCLIC COMPOUNDS
- C07D291/00—Heterocyclic compounds containing rings having nitrogen, oxygen and sulfur atoms as the only ring hetero atoms
- C07D291/02—Heterocyclic compounds containing rings having nitrogen, oxygen and sulfur atoms as the only ring hetero atoms not condensed with other rings
- C07D291/06—Six-membered rings
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
- C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
- C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
- C07D333/06—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to the ring carbon atoms
- C07D333/14—Radicals substituted by singly bound hetero atoms other than halogen
- C07D333/16—Radicals substituted by singly bound hetero atoms other than halogen by oxygen atoms
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- C07C2603/00—Systems containing at least three condensed rings
- C07C2603/02—Ortho- or ortho- and peri-condensed systems
- C07C2603/04—Ortho- or ortho- and peri-condensed systems containing three rings
- C07C2603/06—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members
- C07C2603/10—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members containing five-membered rings
- C07C2603/12—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members containing five-membered rings only one five-membered ring
- C07C2603/18—Fluorenes; Hydrogenated fluorenes
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups
Definitions
- the present invention relates to an O-substituted serine derivative useful as a pharmaceutical intermediate, a cyclic sulfamidate useful for its production, and a method for producing them.
- Access to the tough target which is represented by inhibition of protein-protein interaction, may be better for medium-molecular compounds (molecular weight 500-2000) than for low-molecular compounds.
- the medium-molecular compound may be superior to the antibody in that it can be transferred into cells.
- 40 or more types of peptide drugs are already on the market and are valuable molecular species (Non-Patent Document 1).
- Typical examples of the peptide drug include cyclosporin A and polymyxin B. Focusing on these structures, it can be seen that they are peptide compounds containing some unnatural amino acids.
- An unnatural amino acid is an amino acid that is not naturally encoded on mRNA.
- Non-Patent Document 2 a study on the interaction between the O-substituted serine site of lacosamide and a sodium channel is known (Non-Patent Document 2).
- Non-Patent Document 3 A method of producing from serine and an alkyl halide in the presence of a base using the Williamson ether synthesis method, or an improved method thereof.
- Non-Patent Document 4 A synthetic method applying Schmidt Glycosylation, which is produced from serine and trichloroacetimidate in the presence of an acid catalyst.
- Non-Patent Document 5 A synthetic method produced from serine and allyl carbonate in the presence of a palladium catalyst.
- Patent Documents 1 and 2 A synthetic method in which an aziridine compound derived from serine is reacted with an alcohol in the presence of a Lewis acid or Bronsted acid catalyst. 5. A method of reacting a cyclic sulfamidate derived from serine with an alcohol in the presence of a base (Non-Patent Document 6). These are methods for producing O-alkyl substituted serine derivatives via an intermediate derived from serine.
- the methods of using aziridine derived from serine described in Patent Documents 1 and 2 have a problem of regioselectivity of reaction points.
- the method using aziridine derived from serine described in Non-Patent Document 2 has a problem of regioselectivity of reaction points.
- the method in the presence of a base described in Non-Patent Document 3 is known to eliminate the hydroxyl group of serine, and is limited to the production of highly reactive benzyl ether.
- the substituent on the oxygen of the O-substituted serine derivative that can be produced is limited to an allyl group.
- the present inventor diligently studied the reaction between a cyclic sulfamidate derived from an amino acid derivative and an alcohol, and as a result, using Scheme 1 or Scheme 2 below, excellent regioselectivity and chemical yield while maintaining optical purity were used.
- the present invention has been completed by finding a method for producing an O-substituted serine derivative (I) having
- R 1 is a C 1 -C 6 alkyl which may have a substituent, a C 3 -C 8 cycloalkyl which may have a substituent, an aralkyl which may have a substituent, or a substituent
- R 2 is a C 1 -C 6 alkyl or amino protecting group
- R 4 is a protecting group for a carboxyl group
- L 1 is a single bond or —CH 2 —
- L 2 is a single bond or —CH 2 —
- n is 1 or 2
- L 1 is a single bond
- L 2 is a single bond
- L 2 is a single bond
- L 1 is a single bond.
- the compound represented by the formula, a chemically acceptable salt thereof, or a solvate thereof is reacted to give a compound represented by the general formula (IV): [In formula, R ⁇ 2 >, R ⁇ 4 >, L ⁇ 1 >, L ⁇ 2 > and n are synonymous with the above.
- Step B A compound represented by the general formula (IV): a compound represented by the general formula (IV), a chemically acceptable salt thereof, or a solvate thereof is reacted with an oxidizing agent to obtain the compound represented by the general formula (II): [In formula, R ⁇ 2 >, R ⁇ 4 >, L ⁇ 1 >, L ⁇ 2 > and n are synonymous with the above.
- step C a compound represented by the general formula (II), a chemically acceptable salt thereof, or The solvate thereof is reacted with R 1 OH (wherein R 1 is as defined above) to give a compound represented by the general formula (I), a chemically acceptable salt thereof, or a compound thereof. Obtaining a solvate.
- R 1 is a C 1 -C 6 alkyl which may have a substituent, a C 3 -C 8 cycloalkyl which may have a substituent, an aralkyl which may have a substituent, or a substituent Is a heteroaralkyl which may have R 2 is hydrogen
- R 4 is a protecting group for a carboxyl group
- L 1 is a single bond or —CH 2 —
- L 2 is a single bond or —CH 2 —
- n is 1 or 2
- L 1 is a single bond
- L 2 is a single bond
- L 2 is a single bond
- L 1 is a single bond.
- Step B A compound represented by the general formula (IV ′), a chemically acceptable salt thereof, or a solvate thereof is reacted with an oxidizing agent to give a compound represented by the general formula (II ′): [In the formula, R 2 ′ , R 4 , L 1 , L 2, and n have the same meanings as described above.
- the compound represented by the general formula (I ′) is introduced by introducing the group represented by R 3 into the amino group of the compound represented by the general formula (I ′), a chemically acceptable salt thereof or a solvate thereof.
- R 1 may have one or more substituents independently selected from halogen, aryl optionally substituted with halogen, or hydroxyl group, C 3 -C 8 cycloalkyl, aralkyl, or heteroaralkyl
- R 2 is selected from a Boc group, an Fmoc group, a Cbz group or an Alloc group
- R 4 is benzyl or tert-Bu
- R 1 may have one or more substituents independently selected from halogen, aryl optionally substituted with halogen, or hydroxyl group, C 3 -C 8 cycloalkyl, aralkyl, or heteroaralkyl
- R 2 ′ is selected from a Boc group, an Fmoc group, a Cbz group, or an Alloc group
- R 4 is benzyl or tert-Bu
- Step C is performed in 2,2,2-trifluoroethanol, 1,1,1,3,3,3-hexafluoro-2-propanol, or 2-methyltetrahydrofuran, [1] to The method according to any one of [14].
- step C is performed at a temperature of ⁇ 20 ° C. to a temperature near the boiling point of the solvent used in the step.
- step C further comprises a step of extracting the reaction mixture with an organic solvent, and the extract is used in step D without being concentrated to dryness.
- Step A is carried out in ethyl acetate, isopropyl acetate, or butyl acetate, and a compound represented by the general formula (V), a chemically acceptable salt thereof, or a solvate thereof, or 1.5 to 5 equivalents of thionyl chloride are used relative to the compound represented by the general formula (V ′), a chemically acceptable salt thereof, or a solvate thereof, [1] to [19 ] The method of any one of. [21] The method according to [20], wherein the step A is performed at a temperature of ⁇ 30 ° C. to 0 ° C.
- alkyl is a monovalent group derived from an aliphatic hydrocarbon by removing one arbitrary hydrogen atom, and refers to a hetero atom (an atom other than carbon and hydrogen atoms) in the skeleton. ) Or unsaturated carbon-carbon bonds and having a subset of hydrocarbyl or hydrocarbon radical structures containing hydrogen and carbon atoms.
- the alkyl group includes a straight chain or a branched chain.
- the alkyl group is an alkyl group having 1 to 20 carbon atoms (C 1 -C 20 , hereinafter "C p -C q " means that the carbon number is p to q).
- C 1 -C 6 alkyl group Specific examples of alkyl include methyl, ethyl, propyl, butyl, pentyl, hexyl, isopropyl, tert-butyl group, sec-butyl group and the like.
- cycloalkyl means a saturated or partially saturated cyclic monovalent aliphatic hydrocarbon group and includes a monocycle, a bicyclo ring and a spiro ring. Preferable one is C 3 -C 8 cycloalkyl.
- the cycloalkyl group may be partially unsaturated. Specific examples of cycloalkyl include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl and the like.
- aryl means a monovalent aromatic hydrocarbon ring, and preferably C 6 -C 10 aryl is mentioned.
- Specific examples of the aryl include phenyl, naphthyl (eg, 1-naphthyl, 2-naphthyl) and the like.
- heteroaryl refers to one aromatic ring containing preferably 1 to 4 heteroatoms in the atoms constituting the ring (also referred to as “intracycle” in the present specification).
- a valent group is meant and may be partially saturated.
- the ring may be monocyclic or two fused rings (eg, bicyclic heteroaryl fused with benzene or monocyclic heteroaryl).
- the number of atoms constituting the ring is preferably 5-10 (5-10 membered heteroaryl).
- heteroaryl examples include furyl, thienyl, pyrrolyl, imidazolyl, pyrazolyl, thiazolyl, pyridyl, pyrimidyl, pyridazinyl, pyrazinyl, benzofuranyl, benzothienyl, quinolyl, isoquinolyl, quinazolinyl, quinoxalinyl and the like.
- arylalkyl is a group containing both aryl and alkyl, for example, a group in which at least one hydrogen atom of the alkyl is substituted with aryl, preferably “C”. 6 -C 10 aryl C 1 -C 6 alkyl ". Specific examples of arylalkyl include benzyl and phenethyl.
- heteroarylalkyl (heteroaralkyl) is a group containing both heteroaryl and alkyl, and means, for example, a group in which at least one hydrogen atom of the alkyl is substituted with heteroaryl, and Includes “5- to 10-membered heteroaryl C 1 -C 6 alkyl”.
- Specific examples of the heteroarylalkyl include pyridylmethyl, thienylmethyl, furanylmethyl and the like.
- alkylene means a divalent group derived by removing one arbitrary hydrogen atom from the above “alkyl”, and the alkylene is preferably C 1 -C 6 alkylene. .. Specific examples of such alkylene include methylene, 1,2-ethylene, 1,1-ethylene, 1,3-propylene, tetramethylene, pentamethylene, hexamethylene and the like.
- the "phosphate” as used herein, anions phosphate ion (PO 4 3-), or hydrogen phosphate ion (H 2 PO 4 -, or HPO 4 2-) is a cation of metal Means a salt that is an ion.
- the metal ion is selected from alkali metal ions or alkaline earth metal ions, preferably alkali metal ions, preferably sodium ions, potassium ions, or cesium ions.
- the phosphate preferably includes disodium hydrogen phosphate anhydrous, dipotassium hydrogen phosphate anhydrous, or cesium hydrogen phosphate anhydrous, and hydrates thereof.
- the “acid salt” means a salt that produces hydrogen ions when dissolved in a solvent, and includes sodium dihydrogen phosphate anhydrous (NaH 2 PO 4 ), potassium dihydrogen phosphate anhydrous (KH). 2 PO 4 ), cesium dihydrogen phosphate anhydrous (CsH 2 PO 4 ), disodium hydrogen phosphate anhydrous, dipotassium hydrogen phosphate anhydrous, disesium hydrogen phosphate anhydrous, sodium hydrogen sulfate anhydrous, sulfuric acid Examples include anhydrous potassium hydrogen, anhydrous cesium hydrogen sulfate, and hydrates thereof.
- carbamate groups can be introduced by reacting an amino group with a carbamate agent in the presence of a base catalyst.
- a carbamate agent include Boc 2 O, BocOPh, FmocOSu, FmocCl, CbzCl, AllocCl and the like.
- the base catalyst include lithium carbonate, sodium carbonate, sodium hydrogen carbonate, potassium carbonate, potassium hydrogen carbonate, cesium carbonate, cesium hydrogen carbonate, lithium hydroxide, sodium hydroxide, potassium hydroxide, cesium hydroxide, sodium phosphate and phosphorus.
- Examples thereof include potassium acid salt, N-methylmorpholine, triethylamine, diisopropylethylamine, N, N-dimethylaminopyridine and the like.
- the carbamate group which is a protective group for the amino group, can be removed under basic conditions, acidic conditions, hydrogenolysis reaction conditions, or the like.
- Examples of the protecting group for the carboxyl group include an alkyl group and a benzyl group.
- the protecting group such as an alkyl group or a benzyl group can be removed by a hydrolysis reaction under basic or acidic conditions, a hydrogenolysis reaction in the presence of a transition metal catalyst, or the like.
- the compound represented by each formula of the present invention may be a chemically acceptable salt thereof or a chemically acceptable solvate thereof.
- Chemically acceptable salts of the compound represented by each formula include, for example, hydrochloride; hydrobromide; hydroiodide; phosphate; phosphonate; sulfate; methanesulfonate. , Sulfonates such as p-toluene sulfonate; carboxylates such as acetate, citrate, malate, tartrate, succinate, salicylate; or alkali metals such as sodium and potassium salts.
- salts alkaline earth metal salts such as magnesium salts and calcium salts; ammonium salts such as ammonium salts, alkylammonium salts, dialkylammonium salts, trialkylammonium salts and tetraalkylammonium salts.
- alkaline earth metal salts such as magnesium salts and calcium salts
- ammonium salts such as ammonium salts, alkylammonium salts, dialkylammonium salts, trialkylammonium salts and tetraalkylammonium salts.
- the chemically acceptable solvate of the compound represented by each formula of the present invention refers to a phenomenon in which a solute molecule strongly attracts a solvent molecule in a solution to form one molecular group, and the solvent is water. If it is called a hydrate.
- solvates of the compound of the present invention include not only solvates with water, alcohols (eg, methanol, ethanol, 1-propanol, 2-propanol, etc.), dimethylformamide, etc., but also a plurality of solvates. Solvates with the solvents of are also included.
- amino acid in the present specification includes natural amino acids and unnatural amino acids (amino acid derivatives).
- the compounds of the present invention may be amino acids, preferably amino acid derivatives.
- the “natural amino acid” in the present specification means Gly, Ala, Ser, Thr, Val, Leu, Ile, Phe, Tyr, Trp, His, Glu, Asp, Gln, Asn, Cys, Met, Lys, Arg, Pro. Refers to.
- the non-natural amino acid is not particularly limited, but includes N-alkyl amino acids, ⁇ -amino acids, ⁇ -amino acids, D-type amino acids, N-substituted serines, ⁇ , ⁇ -disubstituted serines, amino acids whose side chains are different from natural amino acids, O- Substituted serine and the like are exemplified.
- the selection of the substituent bonded to the main chain of the amino acid is not particularly limited, but other than hydrogen atom, for example, alkyl group, aryl group, heteroaryl group, aralkyl group, heteroaralkyl Group or a cycloalkyl group or the like, and one or two methylene groups which are not directly connected to the main chain of the amino acid in these groups include an oxygen atom, a nitrogen atom, a carbonyl group (—CO—), Alternatively, it may be substituted with an atom or group selected from the group consisting of a sulfonyl group (—SO 2 —), and each may be substituted with any substituent, and the substituents are not limited.
- an alkyl group, an aryl group, a heteroaryl group, an aralkyl group, a heteroaralkyl group, a cycloalkyl group, an alkoxyalkyl group (eg, a methoxymethyl group) which may be substituted are exemplified.
- the amino acid in the present specification may be a compound having a carboxy group and an amino group in the same molecule. As the amino acid in the present specification, any configuration is allowed.
- the main chain amino group of an amino acid may be unsubstituted (NH 2 group) or may be substituted.
- the main chain carboxyl group of an amino acid may be unsubstituted (CO 2 H group) or may be substituted.
- the “amino acid” in the present specification includes all isotopes corresponding to each.
- An “amino acid” isotope is one in which at least one atom has been replaced with an atom having the same atomic number (proton number) and different mass numbers (sum of protons and neutrons).
- isotopes included in the "amino acid" in the present specification include a hydrogen atom, a carbon atom, a nitrogen atom, an oxygen atom, a phosphorus atom, a sulfur atom, a fluorine atom, a chlorine atom, etc., and each is 2 H, 3 H, 13 C, 14 C, 15 N, 17 O, 18 O, 32 P, 35 S, 18 F, 36 Cl and the like are included.
- halogen atom means a fluorine atom, a chlorine atom, a bromine atom, an iodine atom and the like.
- a halogen atom is a substituent for an aromatic carbocycle, an aromatic heterocycle, etc.
- a preferable halogen atom is a fluorine atom or a chlorine atom.
- a halogen atom is a substituent for an alkyl group or an alkoxy group
- a preferable halogen atom is a fluorine atom.
- “having a hetero atom in the ring” means containing a hetero atom in the atoms constituting the ring, and examples of such a group include a heteroaryl such as a pyridyl group or a thienyl group. Group, piperidyl group, morpholino group and the like. Further, when the hetero atom is an oxygen atom, it is described as “having an oxygen atom in the ring”.
- the “oxidizing agent” is used in a reaction for obtaining a cyclic sulfamidate by oxidizing an in-ring sulfur atom of the cyclic sulfamidite from sulfoxide to sulfone, and hydrogen peroxide, organic peroxide, peroxide
- examples include sulfates, halogen oxide salts, or combinations of halogen oxide salts and transition metal catalysts.
- a combination of 3-chloroperbenzoic acid, oxone, periodate and a ruthenium catalyst is exemplified.
- the periodate include sodium periodate and potassium periodate.
- the ruthenium catalyst include ruthenium trichloride anhydrous or ruthenium trichloride hydrate.
- One aspect of the present invention is to provide an unnatural amino acid useful for the search for peptide drugs.
- Another aspect of the present invention is to provide a method for producing a high-quality unnatural amino acid for supplying a drug substance to a pharmaceutical product.
- the compound represented by the formula (I) can be produced, for example, by Production Method 1 including Step C (addition ring-opening reaction) shown below. Manufacturing method 1:
- R 1 in the formula is C 1 -C 6 alkyl optionally having substituent (s), C 3 -C 8 cycloalkyl optionally having substituent (s), aralkyl optionally having substituent (s) Or a heteroaralkyl which may have a substituent.
- R 1 is preferably C 1 , which may have one or more substituents independently selected from halogen, aryl (wherein the aryl may be substituted with halogen or the like), or a hydroxyl group.
- R 1 examples include methyl, ethyl, i-propyl, n-propyl, n-butyl, i-pentyl, 3,3,3-trifluoro-2-hydroxypropyl, 2,2,3 , 3-tetrafluoropropyl, 2-hydroxypropyl, 2-hydroxy-2-methyl-propyl, 3-hydroxy-3-methyl-butyl, cyclopropyl, benzyl, fluorobenzyl, thienylmethyl, furanylmethyl and the like.
- R 2 in the formula is a protecting group for a C 1 -C 6 alkyl or amino group.
- R 2 includes, for example, methyl, ethyl, benzyl, Fmoc, Boc, Cbz, or Alloc group.
- R 4 in the formula is a protective group for a carboxyl group.
- R 4 includes, for example, alkyl such as t-butyl, trityl, cumyl, allyl, benzyl and the like.
- L 1 is a single bond or —CH 2 —
- L 2 is a single bond or —CH 2 —
- L 1 is a single bond
- L 1 is a single bond
- n represents the number of methylene groups, and n is 1 or 2.
- step C addition ring-opening reaction
- the cyclic sulfamidate derivative (II) is subjected to a nucleophilic substitution reaction with the alcohol derivative (III) to introduce R 1 to give an O-substituted serine derivative
- This step is carried out in the presence or absence of a solubilizing solvent, in the presence or absence of an acid salt, at a temperature between -20 ° C and the boiling point of the solvent, preferably at a temperature of 0 ° C to 180 ° C, for 1 hour. It can be performed by stirring for 48 hours.
- any alcohol derivative having R 1 defined above can be used.
- Non-limiting examples of such alcohol derivatives include methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 3-methylbutanol, 3,3,3-trifluoropropane-1,2-diol, 2,2,3,3-tetrafluoropropyl alcohol, 2-hydroxypropyl alcohol, 2-methylpropane-1,2-diol, 3-hydroxy-3-methyl-butyl alcohol, cyclopropyl alcohol, benzyl alcohol, 3- Examples thereof include fluorobenzyl alcohol, 2-thiophene methanol and 2-furfuryl alcohol.
- solubilizing solvent examples include halogenated solvents such as 2,2,2-trifluoroethanol, 1,1,1,3,3,3-hexafluoro-2-propanol, dichloromethane and chloroform, diethyl ether and tetrahydrofuran.
- the acidic salt examples include sodium dihydrogen phosphate anhydrous (NaH 2 PO 4 ), potassium dihydrogen phosphate anhydrous (KH 2 PO 4 ), cesium dihydrogen phosphate anhydrous (CsH 2 PO 4 ), phosphorus Disodium hydrogen hydrate anhydrous, dipotassium hydrogen phosphate anhydrous, cesium hydrogen phosphate anhydrous, anhydrous sodium hydrogen sulfate, potassium hydrogen sulfate anhydrous, cesium hydrogen sulfate anhydrous, and hydrates thereof, etc.
- NaH 2 PO 4 , KH 2 PO 4 , or CsH 2 PO 4 are preferred. It is also preferable to use 2 to 5 equivalents of these acidic salts with respect to the starting material.
- the target compound can be efficiently obtained.
- Step C can further include a step of extracting the reaction mixture with an organic solvent, which can be used in the next step without concentrating and drying the extract.
- the compound of the present invention represented by the above formula (I) can be produced, for example, by the production method 2 including the step C (addition ring-opening reaction) shown below.
- Manufacturing method 2 :
- R 1 in the formula is C 1 -C 6 alkyl optionally having substituent (s), C 3 -C 8 cycloalkyl optionally having substituent (s), aralkyl optionally having substituent (s) Or a heteroaralkyl which may have a substituent.
- R 1 is preferably halogen, aryl (wherein the aryl may be substituted with halogen or the like), or one or more substituents independently selected from a hydroxyl group, C 1- C 6 alkyl, C 3 -C 8 cycloalkyl, aralkyl or heteroaralkyl.
- R 1 examples include methyl, ethyl, i-propyl, n-propyl, n-butyl, i-pentyl, 3,3,3-trifluoro-2-hydroxypropyl, 2,2,3 , 3-tetrafluoropropyl, 2-hydroxypropyl, 2-hydroxy-2-methyl-propyl, 3-hydroxy-3-methyl-butyl, cyclopropyl, benzyl, fluorobenzyl, thienylmethyl, furanylmethyl and the like.
- R 2 in the formula is hydrogen.
- R 2 ′ in the formula is a protective group for an amino group.
- R 2 ′ includes, for example, Fmoc, Boc, Cbz, or Alloc group.
- R 4 in the formula is a protective group for a carboxyl group.
- R 4 includes, for example, alkyl such as t-butyl, trityl, cumyl, allyl, benzyl and the like.
- L 1 is a single bond or —CH 2 —
- L 2 is a single bond or —CH 2 —
- L 1 is a single bond
- L 1 is a single bond
- n represents the number of methylene groups, and n is 1 or 2.
- a cyclic sulfamidate derivative (II ′) is subjected to a nucleophilic substitution reaction with an alcohol derivative (III) to introduce R 1 and remove R 2 ′.
- the step of producing an O-substituted serine derivative (I) having a free amino group is carried out in the presence or absence of a solubilizing solvent, in the presence or absence of an acid salt, at a temperature between -20 ° C and the boiling point of the solvent, preferably at a temperature of 0 ° C to 180 ° C, for 1 hour. It can be performed by stirring for 48 hours.
- any alcohol derivative having R 1 defined above can be used.
- Non-limiting examples of such alcohol derivatives include methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 3-methylbutanol, 3,3,3-trifluoropropane-1,2-diol, 2,2,3,3-tetrafluoropropyl alcohol, 2-hydroxypropyl alcohol, 2-methylpropane-1,2-diol, 3-hydroxy-3-methyl-butyl alcohol, cyclopropyl alcohol, benzyl alcohol, 3- Examples thereof include fluorobenzyl alcohol, 2-thiophene methanol and 2-furfuryl alcohol.
- solubilizing solvent the same solubilizing solvent used in the step C of the production method 1 can be used.
- the same acidic salt as used in Step C of Production Method 1 can be used.
- Step C can further include a step of extracting the reaction mixture with an organic solvent, which can be used in the next step without concentrating and drying the extract.
- step C The compound of formula (I) obtained through the step C can be further subjected to the following step D (deprotection reaction), and this step is also included in the production method 1 or the production method 2.
- This step is a step of producing an O-substituted serine derivative (I ′) by deprotecting the protecting group (R 4 ) for the carboxyl group of the O-substituted serine derivative of the formula (I).
- This reaction is carried out by reacting the reaction mixture for 1 hour at a temperature of 0 ° C. to around the boiling point of the solvent in the presence or absence of a metal catalyst, preferably a Pd catalyst, or an acid catalyst, and in the presence or absence of a hydrogen source. It can be carried out by stirring for ⁇ 24 hours.
- the metal catalyst examples include those obtained by supporting a metal catalyst represented by activated carbon on a solid represented by palladium carbon and palladium hydroxide carbon, palladium oxide, platinum oxide, Raney nickel, and tetrakis (triphenylphosphine) palladium. , Bis (triphenylphosphine) palladium dichloride, tris (dibenzylideneacetone) dipalladium, palladium acetate and the like.
- Examples of the acid catalyst include hydrochloric acid, hydrobromic acid, trifluoromethanesulfonic acid, sulfuric acid and the like.
- hydrogen gas hydrogen gas
- formic acid formic acid
- ammonium formate etc.
- the reaction can be carried out in a solvent such as ethyl acetate, isopropyl acetate, butyl acetate, methanol or ethanol.
- a solvent such as ethyl acetate, isopropyl acetate, butyl acetate, methanol or ethanol.
- step D The compound of the formula (I ′) obtained through the step D can be further subjected to the following step E (reaction for introducing R 3 ), which is also included in the production method 1 or the production method 2.
- R 1, R 2, L 1, L 2 in Formula, and n the production method 1 and R 1 of the manufacturing method 2, R 2, L 1, L 2, and n and are each synonymous.
- R 3 is an amino-protecting group or C 1 -C 4 alkyl.
- the amino-protecting group is preferably a Boc group, Fmoc group, Cbz group or Alloc group, and C 1 -C 4 alkyl is preferably methyl, ethyl or propyl.
- the introduction of the protecting group (R 3 ) into the amino group can be carried out by reacting the ⁇ -amino group site of the O-substituted serine derivative (I ′) with a carbamate-forming agent. This reaction can be carried out by stirring the reaction mixture at a temperature between ⁇ 10 ° C. and about the boiling point of the solvent in the presence or absence of a base catalyst for 1 hour to 24 hours.
- carbamate agent examples include Boc 2 O, BocOPh, FmocOSu, FmocCl, CbzCl, AllocCl and the like.
- Examples of the base catalyst include lithium carbonate, sodium carbonate, sodium hydrogen carbonate, potassium carbonate, potassium hydrogen carbonate, cesium carbonate, cesium hydrogen carbonate, lithium hydroxide, sodium hydroxide, potassium hydroxide, cesium hydroxide, sodium phosphate. , Potassium phosphate, N-methylmorpholine, triethylamine, diisopropylethylamine, N, N-dimethylaminopyridine and the like.
- acetonitrile As the solvent, acetonitrile, DMF, NMP or the like can be preferably used.
- the introduction of the alkyl group (R 3 ) into the amino group is carried out by reacting the ⁇ -amino group moiety of the O-substituted serine derivative (I ′) with an alkyl aldehyde in a solvent in the presence of an acid catalyst to form an oxazolidinone ring. And then ring-opening reduction with a trialkylsilane in the presence of an acid, using the method of Freidinger et al. (US Pat. No. 4,535,167). These reactions can be performed by stirring the reaction mixture at a reaction temperature from 0 ° C. to around the boiling point of the solvent for 1 to 24 hours.
- the alkylaldehyde formaldehyde, acetaldehyde, propanal, butanal, 2-methylpropanal and the like can be mentioned
- the trialkylsilane triethylsilane and the like
- the acid catalyst 4 -Toluenesulfonic acid, camphorsulfonic acid and the like can be mentioned
- the solvent can include toluene and THF.
- examples of the acid include trifluoroacetic acid.
- an alkyl group (R 3 ) into an amino group is carried out by reacting an amino acid having a protected N-terminus with an alkylating agent in the presence of a base in an organic solvent to obtain an N-alkylamino acid, Shimokawa et al. (Bioorg. Med. Chem. Lett., 2009, 19 (1), 92-95) or Prashad et al. (Org. Lett., 2003, 5 (2), 125-128).
- This reaction can be carried out by stirring the reaction mixture at a reaction temperature from 0 ° C. to around the boiling point of the solvent for 1 to 24 hours.
- examples of the alkylating agent include alkyl halides such as methyl iodide, ethyl iodide, propyl iodide, and butyl iodide, or dialkyl sulfates such as dimethyl sulfate, diethyl sulfate, dipropyl sulfate, and dibutyl sulfate.
- examples of the organic solvent include THF, DMF, DMA, NMP and the like
- examples of the base include sodium hydride, sodium carbonate, potassium carbonate, cesium carbonate and the like.
- the compound of the present invention can be produced by the production method 3 shown below.
- This production method is an embodiment of production method 1, and uses a compound of formula (IIb), in which R 2 of the compound of formula (II) is Fmoc, as a starting material, and through step C and step D, This is a method for obtaining the compound of I'b).
- Manufacturing method 3 is an embodiment of production method 1, and uses a compound of formula (IIb), in which R 2 of the compound of formula (II) is Fmoc, as a starting material, and through step C and step D, This is a method for obtaining the compound of I'b).
- Manufacturing method 3 is an embodiment of production method 1, and uses a compound of formula (IIb), in which R 2 of the compound of formula (II) is Fmoc, as a starting material, and through step C and step D, This is a method for obtaining the compound of I'b).
- Manufacturing method 3 is an embodiment of production method 1, and uses a compound of formula (I
- step C a cyclic sulfamidate derivative (IIb) protected by an Fmoc group is subjected to a nucleophilic substitution reaction with an alcohol derivative (III) to introduce R 1 to protect the Fmoc group with an Fmoc group.
- I a step of producing the O-substituted serine derivative (Ib). This reaction is carried out in the presence or absence of a solubilizing solvent, in the presence or absence of an acid salt, at a temperature between -20 ° C and the boiling point of the solvent, preferably at a temperature of 0 ° C to 180 ° C, for 1 hour. It can be performed by stirring for 48 hours.
- the solubilizing solvent and the acidic salt may be the same as the solubilizing solvent and the acidic salt in step C of production method 1, respectively.
- this production method it is preferable to use trifluoroethanol, hexafluoroisopropyl alcohol, dioxane, tetrahydrofuran, NMP as the solubilizing solvent, and NaH 2 PO 4 , KH 2 PO 4 , or CsH 2 PO 4 as the acidic salt.
- step D deprotection reaction
- the protecting group (R 4 ) for the carboxyl group of the O-substituted serine derivative (Ib) protected by the Fmoc group is deprotected so that the amino group remains protected by the Fmoc group.
- This is a step of producing an O-substituted serine derivative (I'b) in which the carboxyl group is deprotected.
- This reaction is carried out by reacting the reaction mixture for 1 hour at a temperature of 0 ° C. to around the boiling point of the solvent in the presence or absence of a metal catalyst, preferably a Pd catalyst, or an acid catalyst, and in the presence or absence of a hydrogen source. It can be carried out by stirring for ⁇ 24 hours.
- the metal catalyst, the acid catalyst, the hydrogen source, and the solvent can be the same as the metal catalyst, the acid catalyst, the hydrogen source, and the solvent in Step D of Production Method 1, respectively.
- the metal catalyst for example, palladium carbon, palladium hydroxide carbon, a metal catalyst supported on a solid represented by activated carbon, palladium oxide, platinum oxide, Raney nickel, tetrakis (triphenyl) is used. Phosphine) palladium, bis (triphenylphosphine) palladium dichloride, tris (dibenzylideneacetone) dipalladium, palladium acetate, etc.
- an acid catalyst for example, hydrochloric acid, hydrobromic acid, trifluoromethanesulfonic acid, sulfuric acid, etc. It is preferable to use hydrogen gas, formic acid, or ammonium formate as a solvent, and a solvent as a short-chain alkyl alcohol such as methanol or ethanol, or an acetic ester derivative such as ethyl acetate or isopropyl acetate.
- a solvent as a short-chain alkyl alcohol such as methanol or ethanol, or an acetic ester derivative such as ethyl acetate or isopropyl acetate.
- the compound of the present invention can be produced by production method 4-1 shown below.
- This production method is an embodiment of production method 1, and uses a compound of formula (IIc), in which R 2 of the compound of formula (II) is alkyl, as a starting material, and through Step C and Step D to give N-
- This is a method of obtaining a compound of formula (I′c) which is an alkylamino acid, and further performing step E to obtain a compound of formula (I ′′ c).
- Manufacturing Method 4-1 is an embodiment of production method 1, and uses a compound of formula (IIc), in which R 2 of the compound of formula (II) is alkyl, as a starting material, and through Step C and Step D to give N-
- This is a method of obtaining a compound of formula (I′c) which is an alkylamino acid, and further performing step E to obtain a compound of formula (I ′′ c).
- R 1, R 3 in the formula, R 4, L 1, L 2, and n is an R 1 of the production method 1, R 3, R 4, L 1, L 2, and n and respectively the same, Alk Is C 1 -C 4 alkyl.
- step C a cyclic sulfamidate derivative (IIc) substituted with an alkyl group is subjected to a nucleophilic substitution reaction with an alcohol derivative (III) to introduce R 1 and substitute the alkyl group with an alkyl group.
- the solubilizing solvent and the acidic salt may be the same as the solubilizing solvent and the acidic salt in step C of production method 1, respectively.
- this production method it is preferable to use trifluoroethanol, hexafluoroisopropyl alcohol, dioxane, tetrahydrofuran, NMP as the solubilizing solvent, and NaH 2 PO 4 , KH 2 PO 4 , or CsH 2 PO 4 as the acidic salt.
- step D deprotection reaction
- the protecting group (R 4 ) for the carboxyl group of the O-substituted serine derivative (Ic) substituted with an alkyl group is deprotected so that the amino group remains substituted with the alkyl group.
- It is a step of producing an O-substituted serine derivative (I'c) in which a carboxyl group is deprotected.
- This reaction is carried out by reacting the reaction mixture for 1 hour at a temperature of 0 ° C. to around the boiling point of the solvent in the presence or absence of a metal catalyst, preferably a Pd catalyst, or an acid catalyst, and in the presence or absence of a hydrogen source. It can be carried out by stirring for ⁇ 24 hours.
- the metal catalyst, the acid catalyst, the hydrogen source, and the solvent can be the same as the metal catalyst, the acid catalyst, the hydrogen source, and the solvent in Step D of Production Method 1, respectively.
- the metal catalyst for example, palladium carbon, palladium hydroxide carbon, a metal catalyst supported on a solid represented by activated carbon, palladium oxide, platinum oxide, Raney nickel, tetrakis (triphenyl) is used. Phosphine) palladium, bis (triphenylphosphine) palladium dichloride, tris (dibenzylideneacetone) dipalladium, palladium acetate, etc.
- an acid catalyst for example, hydrochloric acid, hydrobromic acid, trifluoromethanesulfonic acid, sulfuric acid, etc. It is preferable to use hydrogen gas, formic acid, or ammonium formate as a solvent, and a solvent as a short-chain alkyl alcohol such as methanol or ethanol, or an acetic acid ester derivative such as ethyl acetate or isopropyl acetate.
- a solvent as a short-chain alkyl alcohol such as methanol or ethanol, or an acetic acid ester derivative such as ethyl acetate or isopropyl acetate.
- step E reaction of introducing a protecting group
- the amino group of the O-substituted serine derivative (I'c) in which the amino group is substituted with an alkyl group and the carboxyl group is deprotected is reacted with a carbamate-forming agent
- a protecting group (R 3 ) is introduced into the amino group to produce an O-disubstituted serine derivative (I ′′ c).
- This reaction can be carried out by stirring the reaction mixture at a temperature between ⁇ 10 ° C. and about the boiling point of the solvent in the presence or absence of a base catalyst for 1 hour to 24 hours.
- the carbamate-forming agent, the base catalyst, and the solvent may be the same as the carbamate-forming agent, the base catalyst, and the solvent in step E of the production method 1.
- a carbamate agent for example, Boc 2 O, BocOPh, FmocOSu, FmocCl, CbzCl, AllocCl, etc.
- a base catalyst for example, lithium carbonate, sodium carbonate, sodium hydrogen carbonate, potassium carbonate, potassium hydrogen carbonate, cesium carbonate
- Solvents such as cesium hydrogen carbonate, lithium hydroxide, sodium hydroxide, potassium hydroxide, cesium hydroxide, sodium phosphate, potassium phosphate, N-methylmorpholine, triethylamine, diisopropylethylamine, N, N-dimethylaminopyridine , Acetonitrile, dichloromethane, tetrahydrofuran, dioxane, dimethylformamide, dimethylacetamide, NMP and the
- the compound of the present invention can be produced by the production method 4-2 shown below.
- This production method is an embodiment of production method 2, and is a compound of formula (I ′) having a free amino group, which is synthesized through Step C and Step D and is an N-alkylamino acid, which is subjected to Step E.
- This is a method for obtaining the compound of (I ′′ c).
- Alk is, C 1 -C 4 alkyl.
- step E reaction of introducing an alkyl group
- US Pat. No. 4,535,167 is the method of Freidinger et al.
- Shimokawa et al. Bioorg. Med. Chem. Lett., 2009, 19 (1), 92). -95
- Prashad et al. Org. Lett., 2003, 5 (2), 125-128.
- the compound of the present invention can be produced by the production method 5-1 shown below.
- This production method is an embodiment of production method 1, and comprises using a compound of formula (IId) in which R 4 of the compound of formula (II) is —C (R 5 ) 3 as a starting material, and performing step C , A method of obtaining a compound of formula (I ′d).
- R 5 in the formula is an optionally substituted C 1 -C 6 alkyl group or an aromatic ring.
- Such R 5 includes, for example, methyl, ethyl, phenyl and the like.
- an N, O-disubstituted serine derivative (I'd) is produced by subjecting a cyclic sulfamidate derivative (IId) to a nucleophilic substitution reaction of an alcohol derivative (III). It is a process. This reaction is carried out in the presence or absence of a solubilizing solvent, in the presence or absence of an acid salt, at a temperature between -20 ° C and the boiling point of the solvent, preferably at a temperature of 0 ° C to 180 ° C, for 1 hour. It can be performed by stirring for 48 hours.
- the solubilizing solvent and the acidic salt may be the same as the solubilizing solvent and the acidic salt in step C of production method 1, respectively.
- this production method it is preferable to use trifluoroethanol, hexafluoroisopropyl alcohol, dioxane, tetrahydrofuran, NMP as the solubilizing solvent, and NaH 2 PO 4 , KH 2 PO 4 , or CsH 2 PO 4 as the acidic salt.
- the compound of the present invention can be produced by the production method 5-2 shown below.
- This production method is an embodiment of production method 2, and uses a compound of formula (II′d) in which R 4 of the compound of formula (II) is —C (R 5 ) 3 as a starting material, Is a method of obtaining a compound of formula (I ′d).
- R 1 in the formula, R 2, R 2 ', L 1, L 2, and n, R 1 of the manufacturing method 2, R 2, R 2' , is L 1, L 2, and n respectively synonymous .
- R 5 in the formula is an optionally substituted C 1 -C 6 alkyl group or an aromatic ring.
- Such R 5 includes, for example, methyl, ethyl, phenyl and the like.
- This step C is a step of producing an O-substituted serine derivative (Id) by subjecting a cyclic sulfamidate derivative (II'd) to a nucleophilic substitution reaction of an alcohol derivative (III). ..
- This reaction is carried out in the presence or absence of a solubilizing solvent, in the presence or absence of an acid salt, at a temperature between -20 ° C and the boiling point of the solvent, preferably at a temperature of 0 ° C to 180 ° C, for 1 hour. It can be performed by stirring for 48 hours.
- the solubilizing solvent and the acidic salt may be the same as the solubilizing solvent and the acidic salt in step C of production method 2, respectively.
- this production method it is preferable to use trifluoroethanol, hexafluoroisopropyl alcohol, dioxane, tetrahydrofuran, NMP as the solubilizing solvent, and NaH 2 PO 4 , KH 2 PO 4 , or CsH 2 PO 4 as the acidic salt.
- the compound of the present invention can be produced, for example, by the production method 6 shown below.
- This production method is an embodiment of production method 2 and is represented by the formula (II′e) wherein R 2 ′ of the compound of formula (II ′) is a Boc group and R 4 is C (R 5 ) 3 .
- Manufacturing method 6 is an embodiment of production method 2 and is represented by the formula (II′e) wherein R 2 ′ of the compound of formula (II ′) is a Boc group and R 4 is C (R 5 ) 3 .
- R 5 is an optionally substituted C 1 -C 6 alkyl or aromatic ring.
- R 5 includes, for example, methyl, ethyl, phenyl and the like.
- step C the N-Boc cyclic sulfamidate derivative (II'e) is subjected to a nucleophilic substitution reaction with an alcohol derivative (III) to give an O-substituted serine derivative ((A) having a free amino group.
- This reaction is carried out in the presence or absence of a solubilizing solvent, in the presence or absence of an acid salt, at a temperature between -20 ° C and the boiling point of the solvent, preferably at a temperature of 0 ° C to 180 ° C, for 1 hour. It can be performed by stirring for 48 hours.
- the solubilizing solvent and the acidic salt may be the same as the solubilizing solvent and the acidic salt in step C of production method 2, respectively.
- this production method it is preferable to use trifluoroethanol, hexafluoroisopropyl alcohol, dioxane, tetrahydrofuran, NMP as the solubilizing solvent, and NaH 2 PO 4 , KH 2 PO 4 , or CsH 2 PO 4 as the acidic salt.
- step D by deprotecting the protecting group (C (R 5 ) 3 ) of the carboxyl group of the O-substituted serine derivative (Ie), O having a free amino group and a free carboxyl group can be obtained.
- a metal catalyst preferably a Pd catalyst, or an acid catalyst
- the metal catalyst, the acid catalyst, the hydrogen source, and the solvent can be the same as the metal catalyst, the acid catalyst, the hydrogen source, and the solvent in Step D of Production Method 1, respectively.
- the metal catalyst for example, palladium carbon, palladium hydroxide carbon, a metal catalyst supported on a solid represented by activated carbon, palladium oxide, platinum oxide, Raney nickel, tetrakis (triphenyl) is used. Phosphine) palladium, bis (triphenylphosphine) palladium dichloride, tris (dibenzylideneacetone) dipalladium, palladium acetate, etc.
- an acid catalyst for example, hydrochloric acid, hydrobromic acid, trifluoromethanesulfonic acid, sulfuric acid, etc. It is preferable to use hydrogen gas, formic acid, or ammonium formate as a solvent, and a solvent as a short-chain alkyl alcohol such as methanol or ethanol, or an acetic acid ester derivative such as ethyl acetate or isopropyl acetate.
- a solvent as a short-chain alkyl alcohol such as methanol or ethanol, or an acetic acid ester derivative such as ethyl acetate or isopropyl acetate.
- step E protecting group introduction reaction
- R 3 ie, a protecting group for an amino group or an alkyl group
- I′e the amino group of the O-substituted serine derivative
- a carbamate agent When introducing a protecting group for an amino group, a carbamate agent is reacted with the ⁇ -amino group of the O-substituted serine derivative (I'e).
- This reaction can be carried out in the presence or absence of a base catalyst by stirring the reaction mixture at -10 ° C to a temperature near the boiling point of the solvent for 1 hour to 24 hours.
- the carbamate-forming agent, the base catalyst, and the solvent may be the same as the carbamate-forming agent, the base catalyst, and the solvent in step E of the production method 2, respectively.
- a carbamate agent for example, Boc 2 O, BocOPh, FmocOSu, FmocCl, CbzCl, AllocCl, etc.
- a base catalyst for example, lithium carbonate, sodium carbonate, sodium hydrogen carbonate, potassium carbonate, potassium hydrogen carbonate, carbonate Cesium, cesium hydrogen carbonate, lithium hydroxide, sodium hydroxide, potassium hydroxide, cesium hydroxide, sodium phosphate, potassium phosphate, N-methylmorpholine, triethylamine, diisopropylethylamine, N, N-dimethylaminopyridine, etc. It is preferable to use acetonitrile, dichloromethane, tetrahydrofuran, dioxane, dimethylformamide, dimethylacetamide
- the cyclic sulfamidate derivative (II) of the present invention used as a starting material of Step C of Production Method 1 is prepared by a method including Step A and Step B shown below using a known compound as a starting material. It can be manufactured.
- R 2 in the formula is a C 1 -C 6 alkyl group or an amino group-protecting group.
- R 2 includes, for example, methyl, ethyl, benzyl, Fmoc, Boc, Cbz, or Alloc group.
- R 4 in the formula is a protective group for a carboxyl group.
- R 4 includes, for example, alkyl such as t-butyl, trityl, cumyl, allyl, benzyl and the like.
- L 1 is a single bond or —CH 2 —
- L 2 is a single bond or —CH 2 —
- L 1 is a single bond
- L 1 is a single bond
- L 1 is a single bond
- n represents the number of methylene groups, and n is 1 or 2.
- Step A is a step of producing a cyclic sulfamidite derivative (IV) by cyclizing an ⁇ -amino acid (V) having a hydroxyl group using a cyclization reagent.
- the reaction mixture is stirred in the presence or absence of a solvent, in the presence or absence of a base, at a temperature of ⁇ 40 ° C. to 25 ° C., preferably at a temperature of ⁇ 40 ° C. to 0 ° C. for 1 to 24 hours. This can be done by
- cyclization reagent examples include thionyl chloride and sulfuryl chloride, and thionyl chloride is preferably used. Further, 1.5 to 5 equivalents of the cyclization reagent with respect to the starting material can be preferably used.
- solvent examples include ethyl acetate, isopropyl acetate, butyl acetate, dichloromethane, acetonitrile and the like.
- Examples of the base include pyridine, TEA, DIPEA and the like, and pyridine can be preferably used.
- Step B is a step of producing a cyclic sulfamidate derivative (II) by oxidizing a sulfur atom in the ring of the cyclic sulfamidite derivative (IV) to a sulfone using an oxidizing agent.
- This reaction can be carried out in the presence or absence of a solvent, at a temperature of ⁇ 20 ° C. to 25 ° C., by stirring the reaction mixture for 1 hour to 24 hours.
- the oxidizing agent include hydrogen peroxide, organic peroxides, persulfates, halogen oxide salts, or a combination of a halogen oxide salt and a transition metal catalyst.
- a combination of 3-chloroperbenzoic acid, oxone, a periodate and a ruthenium catalyst is preferably used, and as the periodate, more specifically, sodium periodate or potassium periodate is used. Can be preferably used.
- the ruthenium catalyst more specifically, ruthenium trichloride anhydrous or ruthenium trichloride hydrate is preferably used.
- 1.5 to 5 equivalents of periodate and 0.01 to 0.2 equivalents of ruthenium catalyst are preferable with respect to the starting material. Used.
- acetonitrile As the solvent, acetonitrile, water, ethyl acetate, isopropyl acetate, and a combination thereof are preferably used, and a mixed solvent of acetonitrile and water is more preferably used.
- the cyclic sulfamidate derivative (II ′) of the present invention used as a starting material of step C of the production method 2 includes a step A and a step B shown below using a known compound as a starting material. It can be manufactured by a method.
- R 2 ′ in the formula is a protective group for an amino group.
- R 2 ′ includes, for example, Fmoc, Boc, Cbz, or Alloc group.
- R 4 in the formula is a protective group for a carboxyl group.
- R 4 includes, for example, alkyl such as t-butyl, trityl, cumyl, allyl, benzyl and the like.
- L 1 is a single bond or —CH 2 —
- L 2 is a single bond or —CH 2 —
- L 1 is a single bond
- L 1 is a single bond
- L 1 is a single bond
- n represents the number of methylene groups, and n is 1 or 2.
- Step A is a step of producing a cyclic sulfamidite derivative (IV ') by cyclizing an ⁇ -amino acid (V') having a hydroxyl group using a cyclization reagent.
- the reaction mixture is stirred in the presence or absence of a solvent, in the presence or absence of a base, at a temperature of ⁇ 40 ° C. to 25 ° C., preferably at a temperature of ⁇ 40 ° C. to 0 ° C. for 1 to 24 hours. This can be done by
- cyclization reagent examples include thionyl chloride and sulfuryl chloride, and thionyl chloride is preferably used. Further, 1.5 to 5 equivalents of the cyclization reagent with respect to the starting material can be preferably used.
- solvent examples include ethyl acetate, isopropyl acetate, butyl acetate, dichloromethane, acetonitrile and the like.
- Examples of the base include pyridine, TEA, DIPEA and the like, and pyridine can be preferably used.
- Step B is a step of producing a cyclic sulfamidate derivative (II ') by oxidizing a sulfur atom in the ring of the cyclic sulfamidite derivative (IV') into a sulfone using an oxidizing agent.
- This reaction can be carried out in the presence or absence of a solvent, at a temperature of ⁇ 20 ° C. to 25 ° C., by stirring the reaction mixture for 1 hour to 24 hours.
- the oxidizing agent include hydrogen peroxide, organic peroxides, persulfates, halogen oxide salts, or a combination of a halogen oxide salt and a transition metal catalyst.
- a combination of 3-chloroperbenzoic acid, oxone, a periodate and a ruthenium catalyst is preferably used, and as the periodate, more specifically, sodium periodate or potassium periodate is used. Can be preferably used.
- the ruthenium catalyst more specifically, ruthenium trichloride anhydrous or ruthenium trichloride hydrate is preferably used.
- 1.5 to 5 equivalents of periodate and 0.01 to 0.2 equivalents of ruthenium catalyst are preferable with respect to the starting material. Used.
- acetonitrile As the solvent, acetonitrile, water, ethyl acetate, isopropyl acetate and a combination thereof are preferably used, and a mixed solvent of acetonitrile and water is more preferably used.
- the cyclic sulfamidate derivative (IId or IIe) used as the starting material of step C can be produced by a method including the following steps A and B using a known compound as the starting material. it can.
- R 5 in the formula is an optionally substituted C 1 -C 6 alkyl or aromatic ring, and is preferably, for example, methyl, ethyl, phenyl or the like.
- L 1 is a single bond or —CH 2 —
- L 2 is a single bond or —CH 2 —
- L 1 is a single bond
- L 1 is a single bond
- L 1 is a single bond
- n represents the number of methylene groups, and n is 1 or 2.
- Step A is a step of producing a cyclic sulfamidite derivative (IVd) or (IVe) by cyclizing an ⁇ -amino acid (Vd) or (Ve) having a hydroxyl group using a cyclization reagent.
- the reaction mixture is stirred in the presence or absence of a solvent, in the presence or absence of a base, at a temperature of ⁇ 40 ° C. to 25 ° C., preferably at a temperature of ⁇ 40 ° C. to 0 ° C. for 1 to 24 hours. This can be done by
- Step B is the oxidation of the sulfur atom in the ring of the cyclic sulfamidite derivative (IVd) or (IVe) to a sulfone using an oxidizing agent to give the cyclic sulfamidate derivative (IId) or (IIe).
- This is a manufacturing process.
- This reaction can be carried out in the presence or absence of a solvent, at a temperature of ⁇ 20 ° C. to 25 ° C., by stirring the reaction mixture for 1 hour to 24 hours.
- step A and step B the reaction can be carried out using the cyclizing reagent, the oxidizing agent, the solvent, and the base as described above, respectively. Further, the obtained cyclic sulfamidate derivative (IId) or (IIe) can be used as a starting material not only in the production method 1 but also in the production method 2. In this case, R 2 in the formula is read as R 2 ′ .
- Isolation and purification of the target compound obtained through each of the above-mentioned reaction steps can be carried out by applying usual chemical operations such as extraction, concentration, distillation, crystallization, filtration, recrystallization and various chromatographies. ..
- the compound of the present invention and its chemically acceptable salt include all stereoisomers (for example, enantiomers, diastereomers (cis and trans geometric isomers) of the target compound obtained through the above-mentioned reaction steps. ))), Racemates of the above isomers, and other mixtures.
- the compound of the present invention may have one or more asymmetric points in the formulas (I), (I ′), (I ′′), and the formula (II). , Racemic mixtures, diastereomeric mixtures, and enantiomers of such compounds.
- the compound according to the present invention When the compound according to the present invention is obtained as a free form, the compound can be converted into a salt which the compound may form or a hydrate or solvate thereof according to a conventional method.
- the compound according to the present invention When the compound according to the present invention is obtained as a salt, hydrate or solvate of the compound, the compound can be converted to its free form according to a conventional method.
- the 1 H-NMR spectrum was measured using an AVANCE III HD 400 BBFO-SMART probe (manufactured by Bruker), the chemical shift of Me 4 Si used as an internal standard substance was set to 0 ppm, and the deuterium lock signal from the sample solvent was measured. Referenced.
- the chemical shift of the signal of the compound to be analyzed is expressed in ppm.
- the integrated value of the signals was calculated based on the ratio of the signal area intensity of each signal.
- Example 1 Benzyl (4S) -5-t-butoxycarbonyl-1,2,5-sulfamidate-4-carboxylate 1) A solution of 16.1 g (135 mmol) of thionyl chloride and 400 mL of ethyl acetate was cooled to ⁇ 15 ° C., and a solution of 20 g (68 mmol) of Boc-Ser-OBzl and 50 mL of ethyl acetate was added dropwise over 5 minutes. After stirring for 5 minutes at the same temperature, 26.8 g (338 mmol) of pyridine was added dropwise over 5 minutes.
- Example 2 Fmoc-Ser (n-Pr) -OH 1) A mixture of 6.00 g (16.7 mmol) of benzyl (4S) -5-t-butoxycarbonyl-1,2,5-sulfamidatecarboxylate and 120 mL of 1-propanol was heated to 90 ° C. for 12 hours. It was stirred. After adding 240 mL of ethyl acetate and 240 mL of 5% sodium hydrogen carbonate water to the reaction mixture, the organic layer and the aqueous layer were separated. The obtained organic layer was washed with 240 mL of 10% saline to obtain H-Ser (n-Pr) -OBzl as an ethyl acetate solution.
- Example 3 Fmoc-Ser (i-Pr) -OH 1) A mixture consisting of 1.00 g (2.8 mmol) of (4S) -5-t-butoxycarbonyl-1,2,5-sulfamidate carboxylic acid benzyl ester and 20 mL of 2-propanol was heated to 80 ° C. Stir for hours. After adding 20 mL of ethyl acetate, 20 mL of 5% sodium hydrogencarbonate aqueous solution, and 20 mL of 10% salt solution to the reaction mixture, it isolate
- Example 4 H-Ser (2-hydroxy-2-methylpropyl) -OBzl
- 4S (4S) -5-t-butoxycarbonyl-1,2,5-sulfamidate carboxylic acid benzyl ester
- 1.00 mL of 2-methylpropane-1,2-diol was added at 80 ° C. Stirred for 30 hours with heating to 50 ° C. and analyzed the reaction mixture using HPLC.
- Example 5 H-Ser (n-Bu) -OBzl A mixture of 25 mg (0.07 mmol) of (4S) -5-t-butoxycarbonyl-1,2,5-sulfamidate carboxylic acid benzyl ester and 0.50 mL of 1-butanol was stirred at 80 ° C. for 24 hours while heating. And the reaction mixture was analyzed using HPLC.
- Example 6 H-Ser (3-methylbutyl) -OBzl A mixture of 25 mg (0.07 mmol) of (4S) -5-t-butoxycarbonyl-1,2,5-sulfamidate carboxylic acid benzyl ester and 0.50 mL of 3-methylbutanol was heated to 80 ° C. for 24 hours. Upon stirring, the reaction mixture was analyzed using HPLC.
- Example 7 (4S) -1,2,5-sulfamidate-4-carboxylic acid benzyl ester
- a mixture of benzyl (4S) -5-t-butoxycarbonyl-1,2,5-sulfamidate carboxylate 1.00 g (2.8 mmol) and 2,2,2-trifluoroethanol 10 mL was heated to 70 ° C. While stirring, the mixture was stirred for 4 hours. After adding 20 mL of ethyl acetate and 40 mL of 5% salt solution to the reaction mixture, the organic layer and the aqueous layer were separated.
- Example 9 Racemization of DH-Ser (n-Pr) -OBzl 1) Reaction mixture: a mixture of benzyl (4R) -5-t-butoxycarbonyl-1,2,5-sulfamidatecarboxylate (1.00 g, 2.8 mmol) and 1-propanol (20 mL) was heated to 90 ° C. While stirring for 15 hours, the reaction mixture was analyzed using HPLC.
- DH-Ser (n-Pr) -OBzl Optical purity: 99.9% ee (detection wavelength 205 nm, retention time 2.54 minutes, high performance liquid chromatography condition 4) UV intensity ratio: 82.1% (detection wavelength 205 nm, retention time 1.40 minutes, condition 2 of high performance liquid chromatography)
- Ethyl acetate solution 2 The obtained ethyl acetate solution 1 was divided into two, and one of them was washed twice with 20 mL of 10% saline, and the obtained organic layer was analyzed by HPLC. Optical purity: 99.8% ee (detection wavelength 205 nm, retention time 2.55 minutes, high performance liquid chromatography condition 4) UV intensity ratio: 85.1% (detection wavelength 205 nm, retention time 1.42 minutes, condition 2 of high performance liquid chromatography)
- Example 10 Optical purity stability of DH-Ser (n-Pr) -OBzl 1)
- the two kinds of ethyl acetate solutions prepared in Example 9 were allowed to stand at room temperature for 3 days and analyzed by HPLC. ..
- Ethyl acetate solution 1 Optical purity: 91.5% ee (detection wavelength 205 nm, retention time 2.54 minutes, high performance liquid chromatography condition 4)
- Ethyl acetate solution 2 Optical purity: 94.7% ee (detection wavelength 205 nm, retention time 2.54 minutes, high performance liquid chromatography condition 4)
- Ethyl acetate solution 1 Optical purity: 85.6% ee (detection wavelength 205 nm, retention time 2.56 minutes, high performance liquid chromatography condition 4)
- Ethyl acetate solution 2 Optical purity: 88.9% ee (detection wavelength 205 nm, retention time 2.55 minutes, high performance liquid chromatography condition 4)
- Ethyl acetate solution 1 Optical purity: 76.8% ee (detection wavelength 205 nm, retention time 2.55 minutes, high performance liquid chromatography condition 4)
- Ethyl acetate solution 2 Optical purity: 82.9% ee (detection wavelength 205 nm, retention time 2.54 minutes, high performance liquid chromatography condition 4)
- Example 11 D-Fmoc-Ser (n-Pr) -OH 1) A mixture of 0.15 g of 10% palladium carbon and 5 mL of methanol was added to the other part of the ethyl acetate solution 1 which was produced in Example 9 and was divided into two parts, and then stirred at room temperature under a hydrogen gas atmosphere for 2 hours. .. The palladium catalyst was filtered off under reduced pressure using Celite, and the resulting mixture was concentrated under reduced pressure to obtain 854 mg of DH-Ser (n-Pr) -OH as a crude product.
- Example 12 D-Fmoc-Ser (i-Pr) -OH 1) A mixture of 50 mg (0.14 mmol) of benzyl (4R) -5-t-butoxycarbonyl-1,2,5-sulfamidatecarboxylate and 1 mL of 2-propanol was stirred for 30 hours while heating at 80 ° C. . Ethyl acetate (1 mL), 5% aqueous sodium hydrogencarbonate (0.5 mL) and 10% brine (0.5 mL) were added to the reaction mixture, and then the mixture was separated into an organic layer and an aqueous layer. The organic layer was obtained as DH-Ser (i-Pr) -OBzl as an ethyl acetate solution.
- DH-Ser (i-Pr) -OBzl Optical purity: 99.9% ee (detection wavelength 205 nm, retention time 2.21 minutes, high performance liquid chromatography condition 4) UV intensity ratio: 78.5% (detection wavelength 205 nm, retention time 1.36 minutes, condition 2 of high performance liquid chromatography)
- Example 13 DH-Ser (2-hydroxy-2-methylpropyl) -OBzl
- 4R -5-t-butoxycarbonyl-1,2,5-sulfamidate carboxylic acid benzyl ester 50 mg (0.14 mmol) and 2-methylpropane-1,2-diol 1 mL was heated to 80 ° C. While stirring for 30 hours, the reaction mixture was analyzed using HPLC.
- Example 14 Benzyl (4S) -5- (9-fluorenyl) methoxycarbonyl-1,2,5-sulfamidate-4-carboxylate 1) A solution containing 14.3 g (120 mmol) of thionyl chloride and 350 mL of ethyl acetate was cooled to ⁇ 15 ° C., and a solution containing 25 g (60 mmol) of Fmoc-Ser-OBzl and 100 mL of ethyl acetate was added dropwise over 10 minutes. After stirring for 5 minutes at the same temperature, 23.7 g (300 mmol) of pyridine was added dropwise over 10 minutes.
- Example 15 Fmoc-Ser (i-Pr) -OBzl (with sodium dihydrogen phosphate added) 1) benzyl (4S) -5- (9-fluorenyl) methoxycarbonyl-1,2,5-sulfamidate carboxylate 1.00 g (2.0 mmol), sodium dihydrogen phosphate 1.00 g, 2-propanol 4 mL A mixture of 2 mL of 2,2,2-trifluoroethanol was stirred for 6 hours while heating at 70 ° C. After adding 20 mL of ethyl acetate and 20 mL of 10% salt solution to the reaction mixture, the organic layer and the aqueous layer were separated. The organic layer was obtained as a Fmoc-Ser (i-Pr) -OBzl ethyl acetate solution.
- Fmoc-Ser-OBzl UV intensity ratio 7.7% (detection wavelength 205 nm, retention time 2.87 minutes, condition 2 of high performance liquid chromatography) 82.4% of the target product was formed, and 7.7% of Fmoc-Ser-OBzl in which sulfamidate was opened without reacting with 2-propanol was formed.
- acid salt sodium dihydrogen phosphate in this case
- Example 16 Fmoc-Ser (i-Pr) -OBzl (without sodium dihydrogen phosphate added)
- a mixture of benzyl (4S) -5- (9-fluorenyl) methoxycarbonyl-1,2,5-sulfamidatecarboxylate (50 mg, 0.10 mmol) and 2-propanol (0.30 mL) was heated to 80 ° C. and heated to 2 ° C. After stirring for time, the reaction mixture was analyzed using HPLC.
- Example 17 Fmoc-Ser (n-Pr) -OBzl (with sodium dihydrogen phosphate added) Benzyl (4S) -5- (9-fluorenyl) methoxycarbonyl-1,2,5-sulfamidatecarboxylate 50 mg (0.10 mmol), sodium dihydrogen phosphate 24 mg, 1-propanol 0.20 mL, 2,2 A mixture consisting of 0.10 mL of 2,2-trifluoroethanol was stirred for 2 hours while heating to 70 ° C., and the reaction mixture was analyzed by HPLC.
- Fmoc-Ser-OBzl UV intensity ratio 3.5% (detection wavelength 205 nm, retention time 2.87 minutes, condition 2 of high performance liquid chromatography)
- the target product was produced at 81.3%, and the target product was further reacted with 1-propanol to cause transesterification (Fmoc-Ser (n-Pr) -O (n-Pr) was 1.4%.
- an acidic salt sodium dihydrogen phosphate in this case
- the yield of the desired product was higher than that of Example 18 in which the reaction was carried out using the same starting material and no acidic salt. It improved by nearly 10%, and the production of by-products decreased by almost 6 times.
- Example 18 Fmoc-Ser (n-Pr) -OBzl (without sodium dihydrogen phosphate added) Benzyl (4S) -5- (9-fluorenyl) methoxycarbonyl-1,2,5-sulfamidatecarboxylate 0.59 g (1.23 mmol), 1-propanol 2.4 mL, 2,2,2-trifluoro A mixture consisting of 1.2 mL of ethanol was stirred for 2 hours while heating to 70 ° C. and the reaction mixture was analyzed by HPLC.
- Example 19 Fmoc-Ser (2-hydroxy-2-methylpropyl) -OBzl (without sodium dihydrogen phosphate added) Benzyl (4S) -5- (9-fluorenyl) methoxycarbonyl-1,2,5-sulfamidatecarboxylate 0.59 g (1.23 mmol), 2-methylpropane-1,2-diol 2.4 mL, 2 A mixture consisting of 1.2 mL of 2,2,2-trifluoroethanol was stirred for 4 hours while heating at 70 ° C., and the reaction mixture was analyzed by HPLC.
- Example 20 Fmoc-Ala (Cl) -OBzl Benzyl (4S) -5- (9-fluorenyl) methoxycarbonyl-1,2,5-sulfamidatecarboxylate 50 mg (0.1 mmol), pyridine hydrochloride 23 mg (0.2 mmol), 1-propanol 0.20 mL, A mixture consisting of 0.10 mL of 2,2,2-trifluoroethanol was stirred for 1 hour while heating to 70 ° C., and the reaction mixture was analyzed by HPLC.
- pyridine hydrochloride was used as the acidic salt, the starting material did not react with 1-propanol and a chloro compound (Fmoc-Ala (Cl) -OBzl) which was ring-opened by chloride ion derived from pyridine hydrochloride was obtained. It was found that using sodium dihydrogen phosphate as the acidic salt efficiently provided the desired product.
- Example 22 Benzyl (4S) -5-methyl-1,2,5-sulfamidate-4-carboxylate 1) A solution consisting of 2.38 g (20 mmol) of thionyl chloride and 50 mL of dichloromethane was cooled to ⁇ 15 ° C., and 2.50 g (10 mmol) of H-MeSer-OBzl hydrochloride was added. After stirring for 5 minutes at the same temperature, 4.75 g (60 mmol) of pyridine was added dropwise over 5 minutes. After stirring at the same temperature for 5 minutes, the mixture was stirred at room temperature for 1 hour.
- Example 23 H-MeSer (n-Pr) -OBzl
- benzyl (4S) -5-methyl-1,2,5-sulfamidatecarboxylate was stirred for 13 hours while heating at 90 ° C.
- Dichloromethane (16.4 mL) and 5% aqueous sodium hydrogen carbonate solution (16.4 mL) were added to the reaction mixture, and then the mixture was separated into an organic layer and an aqueous layer.
- the organic layer was obtained H-MeSer (n-Pr) -OBzl as a solution in ethyl acetate and analyzed using HPLC.
- Example 24 Fmoc-Ser (CH 2 CH (OH) CF 3 ) -OH (sodium dihydrogen phosphate added) 1) benzyl (4S) -5- (9-fluorenyl) methoxycarbonyl-1,2,5-sulfamidate carboxylate 100 mg (0.208 mmol), sodium dihydrogen phosphate 100 mg, 3,3,3-trifluoro A mixture of 0.543 g (4.17 mmol) of propane-1,2-diol and 0.2 mL of 2,2,2-trifluoroethanol was stirred for 48 hours while heating at 70 ° C.
- Example 25 Fmoc-Ser (Bzl) -OH (with sodium dihydrogen phosphate added) 50 mg (0.11 mmol) of tert-butyl (4S) -5- (9-fluorenyl) methoxycarbonyl-1,2,5-sulfamidate carboxylate, 50 mg of sodium dihydrogen phosphate, 0.30 mL of benzyl alcohol (2. After stirring the mixture consisting of 91 mmol) for 2 hours while heating to 90 ° C., the reaction mixture was analyzed using HPLC.
- Example 26 Fmoc-Ser (CH 2 -3F-C 6 H 4) -OH ( sodium dihydrogen phosphate added) Tert-Butyl (4S) -5- (9-fluorenyl) methoxycarbonyl-1,2,5-sulfamidatecarboxylate 50 mg (0.11 mmol), sodium dihydrogen phosphate 50 mg, 3-fluorobenzyl alcohol 0.30 mL After stirring a mixture consisting of (2.78 mmol) for 2 hours while heating to 90 ° C., the reaction mixture was analyzed using HPLC.
- Example 27 Fmoc-Ser (CH 2 -2- thienyl) -OH (sodium dihydrogen phosphate added) (4S) -5- (9-Fluorenyl) methoxycarbonyl-1,2,5-sulfamidatecarboxylate tert-butyl 45 mg (0.11 mmol), sodium dihydrogen phosphate 45 mg, 2-thiophene methanol 0.27 mL ( After stirring a mixture consisting of 2.86 mmol) at room temperature for 48 hours, the reaction mixture was analyzed using HPLC.
- Example 28 Fmoc-Ser (CH 2 -2- furyl) -Ot-Bu (sodium dihydrogen phosphate added) (4S) -5- (9-Fluorenyl) methoxycarbonyl-1,2,5-sulfamidatecarboxylate tert-butyl 45 mg (0.11 mmol), sodium dihydrogen phosphate 45 mg, 2-furfuryl alcohol 0.27 mL After stirring a mixture consisting of (3.11 mmol) at room temperature for 48 hours, the reaction mixture was analyzed using HPLC.
- Example 30 H-homoSer (n-Pr) -OH
- benzyl (4S) -3-t-butoxycarbonyl-2,2-dioxo-1,2,3-oxathiazinane-4-carboxylate 50 mg (0.134 mmol) and 1-propanol 1 mL was heated to 80 ° C. After stirring for 40 h, the reaction mixture was analyzed using HPLC.
- Example 31 H-homoSer (i-Pr) -OH
- benzyl (4S) -3-t-butoxycarbonyl-2,2-dioxo-1,2,3-oxathiazinane-4-carboxylate 50 mg (0.134 mmol) and 2-propanol 1 mL was heated to 80 ° C. After stirring for 40 h, the reaction mixture was analyzed using HPLC.
- Example 32 H-homoSer (3-methylbutyl) -OBzl
- benzyl (4S) -3-t-butoxycarbonyl-2,2-dioxo-1,2,3-oxathiazinane-4-carboxylate 50 mg (0.134 mmol) and 3-methylbutanol 1 mL was heated to 80 ° C. After stirring for 40 hours, the reaction mixture was analyzed using HPLC.
- Example 33 H-homoSer (2-hydroxy-2-methylpropyl) -OBzl Consists of benzyl (4S) -3-t-butoxycarbonyl-2,2-dioxo-1,2,3-oxathiadinane-4-carboxylate 50 mg (0.134 mmol) and 2-methylpropane-1,2-diol 1 mL After stirring the mixture for 40 hours while heating to 80 ° C., the reaction mixture was analyzed using HPLC.
- Example 35 (3S) -3- (9-Fluorenyl) methoxycarbonylamino-4-n-propoxybutyric acid (sodium dihydrogen phosphate added) Consists of (4S) -5- (9-fluorenyl) methoxycarbonyl-1,2,5-sulfamidate-4-tert-butyl acetate 50 mg (0.108 mmol), sodium dihydrogen phosphate 50 mg, and 1-propanol 1 mL. After stirring the mixture for 2 hours while heating to 70 ° C., the reaction mixture was analyzed using HPLC.
- Example 36 (3S) -3- (9-Fluorenyl) methoxycarbonylamino-4-i-propoxybutyric acid (added sodium dihydrogen phosphate) (4S) -5- (9-Fluorenyl) methoxycarbonyl-1,2,5-sulfamidate-4-tert-butyl acetate 30 mg (0.065 mmol), sodium dihydrogen phosphate 30 mg, 2-propanol 0.6 mL After stirring for 2 hours while heating the mixture consisting of 70 ° C. to 70 ° C., the reaction mixture was analyzed using HPLC.
- Example 38 (2S) -2- (9-Fluorenyl) methoxycarbonylaminomethyl-3-n-propoxypropionate benzyl (sodium dihydrogen phosphate added) (5S) -3- (9-Fluorenyl) methoxycarbonyl-2,2-dioxo-1,2,3-oxathiazinane-5-carboxylate benzyl 50 mg (0.104 mmol), sodium dihydrogen phosphate 50 mg, 1-propanol The mixture consisting of 1 mL is stirred with heating to 70 ° C. for 2 hours and then the reaction mixture is analyzed using HPLC.
- Example 39 (2S) -2- (9-Fluorenyl) methoxycarbonylaminomethyl-3-i-propoxypropionate benzyl (sodium dihydrogen phosphate added) (5S) -3- (9-Fluorenyl) methoxycarbonyl-2,2-dioxo-1,2,3-oxathiazinane-5-carboxylate benzyl 50 mg (0.104 mmol), sodium dihydrogen phosphate 50 mg, 2-propanol The mixture consisting of 1 mL is stirred with heating to 70 ° C. for 2 hours and then the reaction mixture is analyzed using HPLC.
- Example 41 Benzyl (2R) -2- (9-fluorenyl) methoxycarbonylaminomethyl-3-n-propoxypropionate (with sodium dihydrogen phosphate added) (5R) -3- (9-Fluorenyl) methoxycarbonyl-2,2-dioxo-1,2,3-oxathiazinane-5-carboxylate benzyl 50 mg (0.104 mmol), sodium dihydrogen phosphate 50 mg, 1-propanol The mixture consisting of 1 mL is stirred with heating to 70 ° C. for 2 hours and then the reaction mixture is analyzed using HPLC.
- Example 42 benzyl (2R) -2- (9-fluorenyl) methoxycarbonylaminomethyl-3-i-propoxypropionate (with sodium dihydrogen phosphate added) (5R) -3- (9-Fluorenyl) methoxycarbonyl-2,2-dioxo-1,2,3-oxathiazinane-5-carboxylate benzyl 50 mg (0.104 mmol), sodium dihydrogen phosphate 50 mg, 2-propanol The mixture consisting of 1 mL is stirred with heating to 70 ° C. for 2 hours and then the reaction mixture is analyzed using HPLC.
- the present invention provides a novel method for producing an O-substituted serine derivative.
- an unnatural amino acid useful for the search for a peptide drug and / or the drug substance supply of a drug with high regioselectivity, chemical yield, and optical purity. ..
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Abstract
Description
1.Williamsonエーテル合成法を利用して塩基存在下でセリンとアルキルハライドから製造する方法、あるいはその改良法(非特許文献3)。
2.酸触媒存在下でセリンとトリクロロアセトイミダートから製造する、Schmidt Glycosylationを応用した合成法(非特許文献4)。
3.パラジウム触媒存在下でセリンと炭酸アリルエステルから製造する合成法(非特許文献5)。
これらは、セリンにアルキル基を直接的に導入する方法である。
4.セリンから誘導したアジリジン化合物をルイス酸もしくはブレンステッド酸触媒の存在下でアルコールと反応する合成法(特許文献1、2)。
5.セリンから誘導した環状スルファミダートを塩基の存在下でアルコールと反応させる方法(非特許文献6)。
これらはセリンから誘導した中間体を介してO-アルキル置換セリン誘導体を製造する方法である。
非特許文献2に記載のセリンから誘導したアジリジンを用いる方法では、反応点の位置選択性の課題を有する。
非特許文献3に記載の塩基存在下での方法では、セリンの水酸基が脱離することが知られており、反応性の高いベンジルエーテルの製造に限定される。
非特許文献4に記載のトリクロロアセトイミダートから製造する方法では、製造できるO-置換セリン誘導体の酸素上の置換基がアリル基に限定される。
非特許文献5に記載のアリルエーテルのカップリング反応による方法では、製造できるO-置換セリン誘導体の酸素上の置換基がアリル基に限定される。
非特許文献6に記載のセリンから誘導したスルファミダートを用いる方法では、高収率で製造可能なO-置換セリン誘導体は、もっぱらフェノール等の芳香環で置換されたO-置換セリンに限られていて、アルキルアルコールと反応させることで得られるO-アルキル置換セリン誘導体の合成はわずか16%の収率で得られる一例が報告されているのみである。すなわち、環状スルファミダートとアルコールを作用させて満足できる位置選択性と収率と光学純度を達成したO-アルキル置換セリン誘導体の合成例は極めて限定的と言える。
〔1〕以下の工程を含む、一般式(I):
[式中、
R1は置換基を有していてもよいC1-C6アルキル、置換基を有していてもよいC3-C8シクロアルキル、置換基を有していてもよいアラルキル、または置換基を有していてもよいヘテロアラルキルであり、
R2はC1-C6アルキルまたはアミノ基の保護基であり、
R4はカルボキシル基の保護基であり、
L1は単結合または-CH2-であり、
L2は単結合または-CH2-であり、
nは1または2であり、
但し、L1が-CH2-である場合、L2は単結合であり、L2が-CH2-である場合、L1は単結合である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を製造する方法:
工程A:環化試薬と、一般式(V):
[式中、R2、R4、L1、L2、及びnは上記と同義である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物とを反応させて、一般式(IV):
[式中、R2、R4、L1、L2、及びnは上記と同義である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を得る工程、
工程B:一般式(IV)で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を酸化剤と反応させて、一般式(II):
[式中、R2、R4、L1、L2、及びnは上記と同義である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を得る工程、および
工程C:一般式(II)で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物をR1OH(式中、R1は上記と同義である)と反応させて、一般式(I)で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を得る工程。
〔2〕以下の工程を含む、一般式(I):
[式中、
R1は置換基を有していてもよいC1-C6アルキル、置換基を有していてもよいC3-C8シクロアルキル、置換基を有していてもよいアラルキル、または置換基を有していてもよいヘテロアラルキルであり、
R2は水素であり、
R4はカルボキシル基の保護基であり、
L1は単結合または-CH2-であり、
L2は単結合または-CH2-であり、
nは1または2であり、
但し、L1が-CH2-である場合、L2は単結合であり、L2が-CH2-である場合、L1は単結合である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を製造する方法:
工程A:環化試薬と、一般式(V’):
[式中、R2’はアミノ基の保護基であり、R4、L1、L2、及びnは上記と同義である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物とを反応させて、一般式(IV’):
[式中、R2’、R4、L1、L2、及びnは上記と同義である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を得る工程、
工程B:一般式(IV’)で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を酸化剤と反応させて、一般式(II’):
[式中、R2’、R4、L1、L2、及びnは上記と同義である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を得る工程、および
工程C:一般式(II’)で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物をR1OH(式中、R1は上記と同義である)と反応させて、前記一般式(I)で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を得る工程。
〔3〕一般式(I)で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物のR4で表されるカルボキシル基の保護基を脱保護して、一般式(I’):
[式中、R1、R2、L1、L2、及びnはそれぞれ〔1〕または〔2〕と同義である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を得る工程(工程D)をさらに含む、〔1〕または〔2〕に記載の方法。
〔4〕一般式(I’)で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物のアミノ基にR3で表される基を導入して、一般式(I’’):
[式中、R1、R2、L1、L2、及びnはそれぞれ〔1〕または〔2〕と同義であり、R3はアミノ基の保護基またはC1-C4アルキルである。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を得る工程(工程E)をさらに含む、〔3〕に記載の方法。
〔5〕R1が、ハロゲン、ハロゲンで置換されていてもよいアリール、または水酸基から独立して選択される1つまたは複数の置換基を有していてもよい、C1-C6アルキル、C3-C8シクロアルキル、アラルキル、またはヘテロアラルキルであり、
R2が、Boc基、Fmoc基、Cbz基またはAlloc基から選択され、
R4が、ベンジルまたはtert-Buである、
〔1〕、〔3〕、または〔4〕に記載の方法。
〔6〕R1が、ハロゲン、ハロゲンで置換されていてもよいアリール、または水酸基から独立して選択される1つまたは複数の置換基を有していてもよい、C1-C6アルキル、C3-C8シクロアルキル、アラルキル、またはヘテロアラルキルであり、
R2’が、Boc基、Fmoc基、Cbz基、またはAlloc基から選択され、
R4が、ベンジル、またはtert-Buである、
〔2〕~〔4〕のいずれかに記載の方法。
〔7〕R3が、Boc基、Fmoc基、Cbz基、Alloc基またはメチルから選択される、〔4〕に記載の方法。
〔8〕工程Aで用いられる環化試薬が、塩化チオニルである、〔1〕~〔7〕のいずれかに記載の方法。
〔9〕工程Bで用いられる酸化剤が、過ヨウ素酸塩とルテニウム触媒の組み合わせである、〔1〕~〔8〕のいずれかに記載の方法。
〔10〕一般式(IV)で表される化合物、その化学的に許容される塩、もしくはそれらの溶媒和物、または一般式(IV’)で表される化合物、その化学的に許容される塩、もしくはそれらの溶媒和物に対して、1.5~5当量の過ヨウ素酸塩、および0.01~0.2当量のルテニウム触媒が用いられる、〔9〕の方法。
〔11〕工程Bが、アセトニトリルと水の混合溶媒中で行われる、〔1〕~〔10〕のいずれかに記載の方法。
〔12〕工程Cが、酸性塩の存在下で行われる、〔1〕~〔11〕のいずれかに記載の方法。
〔13〕酸性塩がNaH2PO4、KH2PO4またはCsH2PO4である、〔12〕に記載の方法
〔14〕一般式(II)で表される化合物、その化学的に許容される塩、もしくはそれらの溶媒和物、または一般式(II’)で表される化合物、その化学的に許容される塩、もしくはそれらの溶媒和物に対して、2~5当量のNaH2PO4、KH2PO4またはCsH2PO4が用いられる、〔13〕に記載の方法。
〔15〕工程Cが、2、2、2-トリフルオロエタノール、1,1,1,3,3,3-ヘキサフルオロ-2-プロパノール、または2-メチルテトラヒドロフラン中で行われる、〔1〕~〔14〕のいずれかに記載の方法。
〔16〕工程Cが、-20℃~当該工程で用いられる溶媒の沸点付近の温度で行われる、〔1〕~〔15〕のいずれかに記載の方法。
〔17〕工程Cが、反応混合物を有機溶媒で抽出する工程をさらに含み、その抽出液が濃縮乾固されずに工程Dで用いられる、〔1〕~〔16〕のいずれかに記載の方法。
〔18〕工程Dが、Pd触媒の存在下で行われる、〔3〕~〔17〕のいずれかに記載の方法。
〔19〕工程Dが、水素ガス、ギ酸、またはギ酸アンモニウムの存在下で行われる、〔18〕の方法。
〔20〕工程Aが、酢酸エチル、酢酸イソプロピル、または酢酸ブチル中で行われ、かつ一般式(V)で表される化合物、その化学的に許容される塩、もしくはそれらの溶媒和物、または一般式(V’)で表される化合物、その化学的に許容される塩、もしくはそれらの溶媒和物に対して、1.5~5当量の塩化チオニルが用いられる、〔1〕~〔19〕のいずれかに記載の方法。
〔21〕工程Aが、-30℃~0℃の温度で行われる、〔20〕に記載の方法。
AcOEt:酢酸エチル
Alloc基:アリルオキシカルボニル基
t-Bu基:tert-ブチル基
Boc基:tert-ブトキシカルボニル基
Cbz基:ベンジルオキシカルボニル基
DIPEA:N,N-ジイソプロピルエチルアミン
DMA:N,N-ジメチルアセトアミド
DME:1,2-ジメトキシエタン
DMF:N,N-ジメチルホルムアミド
DMSO:ジメチルスルホキシド
EtOH:エタノール
Fmoc基:9-フルオレニルメチルオキシカルボニル基
MeCN:アセトニトリル
NMP:N-メチルピロリドン
TEA:トリエチルアミン
TFE:2,2,2-トリフルオロエタノール
THF:テトラヒドロフラン
次に本発明の化合物の一般的な製造方法について説明する。
ある局面において、式(I)で示される化合物は、例えば、以下に示す工程C(付加開環反応)を含む製造方法1により製造することができる。
製造方法1:
製造方法3:
製造方法4-1:
製造方法4-2:
製造方法5-1:
製造方法5-2:
製造方法6:
装置:Waters社製UPLC ACQUITY;
カラム:BEH(1.7μm,2.1mmI.D.x50mm,Waters社製);
移動相:0.05%トリフルオロ酢酸を含有する水(A)及び0.05%トリフルオロ酢酸を含有するアセトニトリル(B);
溶出法:5%Bから100%B(4.0分)、100%Bで保持(0.5分)のステップワイズな溶媒勾配溶出;
流速:0.5mL/分。
カラム温度:35℃。
装置:Waters社製UPLC ACQUITY;
カラム:BEH(1.7μm,2.1mmI.D.x50mm,Waters社製);
移動相:0.1%ギ酸を含有する水(A)及び0.1%ギ酸を含有するアセトニトリル(B);
溶出法:5%Bから100%B(4.0分)、100%Bで保持(0.5分)のステップワイズな溶媒勾配溶出;
流速:0.5mL/分。
カラム温度:25℃。
装置:Waters社製UPLC ACQUITY;
カラム:CHIRALCELL OD-3R(3.0μm,4.6mmI.D.x50mm,ダイセル社製);
移動相:0.1%ギ酸を含有する水(A)及び0.1%ギ酸を含有するアセトニトリル(B);
溶出法:5%Bから100%B(4.0分)、100%Bで保持(0.5分)のステップワイズな溶媒勾配溶出;
流速:1.5mL/分。
カラム温度:25℃。
装置:Waters社製UPLC ACQUITY;
カラム:CHIRALPAK IA-3(3.0μm,4.6mmI.D.x50mm,ダイセル社製);
移動相:10mM酢酸アンモニウムを含有する水(A)及び10mM酢酸アンモニウムを含有するメタノール(B);
溶出法:5%Bから60%B(0.5分)、60%Bから80%B(3.0分)、80%Bから100%B(0.5分)、100%Bで保持(0.5分)のステップワイズな溶媒勾配溶出;
流速:1.2mL/分。
カラム温度:25℃。
装置:Waters社製UPLC ACQUITY;
カラム:CHIRALPAK IG-3(3.0μm,4.6mmI.D.x50mm,ダイセル社製);
移動相:10mM酢酸アンモニウムを含有する水(A)及び10mM酢酸アンモニウムを含有するメタノール(B);
溶出法:5%Bから60%B(0.1分)、60%Bから100%B(3.4分)、100%Bで保持(1.0分)のステップワイズな溶媒勾配溶出;
流速:1.2mL/分。
カラム温度:25℃。
実施例1:(4S)-5-t-ブトキシカルボニル-1,2,5-スルファミダート-4-カルボン酸ベンジル
1) 塩化チオニル 16.1g(135mmol)、酢酸エチル 400mLからなる溶液を-15℃に冷却し、Boc-Ser-OBzl 20g(68mmol)、酢酸エチル 50mLからなる溶液を5分かけて滴下した。そのままの温度で5分撹拌した後、ピリジン 26.8g(338mmol)を5分かけて滴下した。そのままの温度で15分撹拌した後、室温で22時間撹拌した。反応混合物に水 200mLを加えた後、有機層と水層に分離した。得られた有機層を1N-塩酸 200mLおよび10%食塩水 200mLで洗浄した後、減圧下濃縮することで(4S)-5-t-ブトキシカルボニル-1,2,5-スルファミダイトカルボン酸ベンジル 23.9gの粗精製物をジアステレオ混合物として得た。
光学純度:99.9%ee(検出波長205nm、保持時間:2.87分、高速液体クロマトグラフィーの条件3)
UV強度比:99.2%(検出波長205nm、保持時間:2.77分、高速液体クロマトグラフィーの条件2)
1H-NMR(CDCl3、400MHz)δ:1.50(9H、s)、4.67(1H、dd、J=9.6、2.0)、4.76(1H、dd、J=9.6、6.4)、4.80-4.86(1H、m)、5.23(1H、d、J=12.0)、5.32(1H、d、J=12.0)、7.30-7.42(5H、m)
1) (4S)-5-t-ブトキシカルボニル-1,2,5-スルファミダートカルボン酸ベンジル 6.00g(16.7mmol)、1-プロパノール 120mLからなる混合物を90℃に加熱しながら12時間撹拌した。反応混合物に酢酸エチル 240mL、5%炭酸水素ナトリウム水 240mLを加えた後、有機層と水層に分離した。得られた有機層を10%食塩水 240mLで洗浄することでH-Ser(n-Pr)-OBzlを酢酸エチル溶液として得た。
光学純度:99.5%ee(検出波長205nm、保持時間2.76分、高速液体クロマトグラフィーの条件4)
UV強度比:87.3%(検出波長205nm、保持時間1.42分、高速液体クロマトグラフィーの条件2)
光学純度:99.6%ee(検出波長205nm、保持時間3.35分、高速液体クロマトグラフィーの条件3)
UV強度比:96.2%(検出波長205nm、保持時間2.74分、高速液体クロマトグラフィーの条件2)
1H-NMR(DMSO-d6、400MHz)δ:0.84(3H、t、J=7.2)、1.42-1.56(2H、m)、3.28-3.42(2H、m)、3.56-3.70(2H、m)、4.16-4.34(4H、m)、7.32(2H、dt、J=7.2、0.8)、7.42(2H、t、J=7.6)、7.61(1H、d、J=8.0)、7.74(2H、d、J=7.8)、7.89(2H、d、J=7.6)、12.76(1H、brs)yy
1) (4S)-5-t-ブトキシカルボニル-1,2,5-スルファミダートカルボン酸ベンジルエステル 1.00g(2.8mmol)、2-プロパノール 20mLからなる混合物を80℃に加熱しながら36時間撹拌した。反応混合物に酢酸エチル 20mL、5%炭酸水素ナトリウム水 20mL、10%食塩水 20mLを加えた後、有機層と水層に分離した。有機層をH-Ser(i-Pr)-OBzlを酢酸エチル溶液として得た。
光学純度:99.9%ee(検出波長205nm、高速液体クロマトグラフィーの条件4)
UV強度比:84.4%(検出波長205nm、保持時間1.38分、高速液体クロマトグラフィーの条件2)
光学純度:99.9%ee(検出波長205nm、保持時間3.25分、高速液体クロマトグラフィーの条件3)
UV強度比:98.7%(検出波長205nm、保持時間2.74分、高速液体クロマトグラフィーの条件2)
1H-NMR(DMSO-d6、400MHz)δ:1.06(3H、d、J=6.0)、1.08(3H、d、J=6.0)、3.48-3.66(3H、m)、4.10-4.32(4H、m)、7.33(2H、dt、J=7.6、0.8)、7.42(2H、t、J=7.0)、7.56(1H、d、J=8.0)、7.74(2H、d、J=7.8)、7.89(2H、d、J=7.6)、12.73(1H、brs)
(4S)-5-t-ブトキシカルボニル-1,2,5-スルファミダートカルボン酸ベンジルエステル 50mg(0.10mmol)、2-メチルプロパン-1,2-ジオール 1.00mLからなる混合物を80℃に加熱しながら30時間撹拌し、反応混合物をHPLCを用いて分析した。
光学純度:99.9%ee(検出波長205nm、保持時間1.78分、高速液体クロマトグラフィーの条件4)
UV強度比:73.3%(検出波長205nm、保持時間1.22分、高速液体クロマトグラフィーの条件2)
(4S)-5-t-ブトキシカルボニル-1,2,5-スルファミダートカルボン酸ベンジルエステル 25mg(0.07mmol)、1-ブタノール 0.50mLからなる混合物を80℃に加熱しながら24時間撹拌し、反応混合物をHPLCを用いて分析した。
UV強度比:77.0%(検出波長205nm、保持時間1.83分、高速液体クロマトグラフィーの条件1)
ESI(LC/MSポジティブモード)m/z:252.48(M+H+)
(4S)-5-t-ブトキシカルボニル-1,2,5-スルファミダートカルボン酸ベンジルエステル 25mg(0.07mmol)、3-メチルブタノール 0.50mLからなる混合物を80℃に加熱しながら24時間撹拌し、反応混合物をHPLCを用いて分析した。
UV強度比:73.9%(検出波長205nm、保持時間2.00分、高速液体クロマトグラフィーの条件1)
ESI(LC/MSポジティブモード)m/z:266.52(M+H+)
(4S)-5-t-ブトキシカルボニル-1,2,5-スルファミダートカルボン酸ベンジル 1.00g(2.8mmol)、2,2,2-トリフルオロエタノール 10mLからなる混合物を70℃に加熱しながら4時間撹拌した。反応混合物に酢酸エチル 20mL、5%食塩水 40mLを加えた後、有機層と水層に分離した。有機層を減圧下濃縮して(4S)-1,2,5-スルファミダートカルボン酸ベンジルエステル 734mgを粗精製物として得た。
得られた粗精製物は、シリカゲルカラムクロマトグラフィー(溶出溶媒:酢酸エチル-ヘキサン)で精製し(4S)-1,2,5-スルファミダートカルボン酸ベンジル 649mg(収率:90.2%)を淡黄色固体として得た。
UV強度比:99.6%(検出波長205nm、保持時間1.94分、高速液体クロマトグラフィーの条件1)
1H-NMR(CDCl3、400MHz)δ:4.44-4.52(1H、m)、4.56(1H、dd、J=8.8、5.6)、4.74(1H、dd、J=8.8、7.6)、5.09-5.18(1H,m)、5.27(1H、d、J=11.6)、5.30(1H、d、J=11.6)、7.32-7.44(5H、m)
実施例8:(4R)-5-t-ブトキシカルボニル-1,2,5-スルファミダート-4-カルボン酸ベンジル
1) 塩化チオニル 8.05g(67.7mmol)、アセトニトリル 140mLからなる溶液を-40℃に冷却し、D-Boc-Ser-OBzl 10.0g(33.8mmol)、アセトニトリル 30mLからなる溶液を5分かけて滴下した。そのままの温度で5分撹拌した後、ピリジン 13.4g(169mmol)を5分かけて滴下した。そのままの温度で5分撹拌した後、室温で4時間撹拌した。反応混合物に水 340mL、および、酢酸エチル 170mLを加えた後、有機層と水層に分離した。得られた有機層を5%炭酸水素ナトリウム水 170mL、および、0.5N-塩酸 170mLと10%食塩水 170mLの混合溶液で洗浄した後、減圧下濃縮することで(4R)-5-t-ブトキシカルボニル-1,2,5-スルファミダイトカルボン酸ベンジル 10.76gの粗精製物をジアステレオ混合物として得た。
光学純度:99.9%ee(検出波長205nm、保持時間2.93分、高速液体クロマトグラフィーの条件3)
UV強度比:97.7%(検出波長205nm、保持時間2.77分、高速液体クロマトグラフィーの条件2)
1H-NMR(CDCl3、400MHz)δ:1.49(9H、s)、4.67(1H、dd、J=9.6、2.2)、4.76(1H、dd、J=9.6、6.4)、4.80-4.86(1H、m)、5.23(1H、d、J=12.0)、5.32(1H、d、J=12.0)、7.30-7.42(5H、m)
1)反応混合物:(4R)-5-t-ブトキシカルボニル-1,2,5-スルファミダートカルボン酸ベンジル 1.00g(2.8mmol)、1-プロパノール 20mLからなる混合物を90℃に加熱しながら15時間撹拌し、反応混合物をHPLCを用いて分析した。
光学純度:99.9%ee(検出波長205nm、保持時間2.54分、高速液体クロマトグラフィーの条件4)
UV強度比:82.1%(検出波長205nm、保持時間1.40分、高速液体クロマトグラフィーの条件2)
光学純度:99.9%ee(検出波長205nm、保持時間2.55分、高速液体クロマトグラフィーの条件4)
UV強度比:84.7%(検出波長205nm、保持時間1.42分、高速液体クロマトグラフィーの条件2)
光学純度:99.8%ee(検出波長205nm、保持時間2.55分、高速液体クロマトグラフィーの条件4)
UV強度比:85.1%(検出波長205nm、保持時間1.42分、高速液体クロマトグラフィーの条件2)
光学純度:82.8%ee(検出波長205nm、保持時間2.54分、高速液体クロマトグラフィーの条件4)
UV強度比:79.7%(検出波長205nm、保持時間1.39分、高速液体クロマトグラフィーの条件2)
光学純度:72.6%ee(検出波長205nm、保持時間2.53分、高速液体クロマトグラフィーの条件4)
UV強度比:79.1%(検出波長205nm、保持時間1.39分、高速液体クロマトグラフィーの条件2)
1)実施例9で製造した2種類の酢酸エチル溶液を室温で3日間静置し、HPLCを用いて分析した。
酢酸エチル溶液1:
光学純度:91.5%ee(検出波長205nm、保持時間2.54分、高速液体クロマトグラフィーの条件4)
酢酸エチル溶液2:
光学純度:94.7%ee(検出波長205nm、保持時間2.54分、高速液体クロマトグラフィーの条件4)
酢酸エチル溶液1:
光学純度:85.6%ee(検出波長205nm、保持時間2.56分、高速液体クロマトグラフィーの条件4)
酢酸エチル溶液2:
光学純度:88.9%ee(検出波長205nm、保持時間2.55分、高速液体クロマトグラフィーの条件4)
酢酸エチル溶液1:
光学純度:76.8%ee(検出波長205nm、保持時間2.55分、高速液体クロマトグラフィーの条件4)
酢酸エチル溶液2:
光学純度:82.9%ee(検出波長205nm、保持時間2.54分、高速液体クロマトグラフィーの条件4)
1) 実施例9で製造し、2つに分けた酢酸エチル溶液1のもう一方に10%パラジウム炭素 0.15g、メタノール 5mLの混合物を加えた後、水素ガス雰囲気下、室温で2時間撹拌した。パラジウム触媒をセライトを用いて減圧ろ別して得られた混合物を減圧濃縮することでD-H-Ser(n-Pr)-OH 854mgを粗精製物として得た。
光学純度:99.9%ee(検出波長205nm、保持時間3.12分、高速液体クロマトグラフィーの条件3)
UV強度比:97.3%(検出波長205nm、保持時間2.74分、高速液体クロマトグラフィーの条件2)
1H-NMR(DMSO-d6、400MHz)δ:0.84(3H、t、J=7.2)、1.42-1.56(2H、m)、3.28-3.42(2H、m)、3.56-3.70(2H、m)、4.16-4.34(4H、m)、7.32(2H、dt、J=7.2、0.8)、7.42(2H、t、J=7.6)、7.61(1H、d、J=8.0)、7.74(2H、d、J=7.8)、7.89(2H、d、J=7.6)、12.76(1H、brs)
1) (4R)-5-t-ブトキシカルボニル-1,2,5-スルファミダートカルボン酸ベンジル 50mg(0.14mmol)、2-プロパノール 1mLからなる混合物を80℃に加熱しながら30時間撹拌した。反応混合物に酢酸エチル 1mL、5%炭酸水素ナトリウム水 0.5mL、10%食塩水 0.5mLを加えた後、有機層と水層に分離した。有機層をD-H-Ser(i-Pr)-OBzlを酢酸エチル溶液として得た。
光学純度:99.9%ee(検出波長205nm、保持時間2.21分、高速液体クロマトグラフィーの条件4)
UV強度比:78.5%(検出波長205nm、保持時間1.36分、高速液体クロマトグラフィーの条件2)
光学純度:>95%ee、光学異性体と不純物が分離せず正確な値は不明(検出波長205nm、保持時間3.05分、高速液体クロマトグラフィーの条件3)
UV強度比:85.6%(検出波長205nm、保持時間2.70分、高速液体クロマトグラフィーの条件2)
(4R)-5-t-ブトキシカルボニル-1,2,5-スルファミダートカルボン酸ベンジルエステル 50mg(0.14mmol)、2-メチルプロパン-1,2-ジオール 1mLからなる混合物を80℃に加熱しながら30時間撹拌し、反応混合物をHPLCを用いて分析した。
光学純度:99.9%ee(検出波長205nm、保持時間2.16分、高速液体クロマトグラフィーの条件4)
UV強度比:73.4%(検出波長205nm、保持時間1.22分、高速液体クロマトグラフィーの条件2)
実施例14:(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダート-4-カルボン酸ベンジル
1) 塩化チオニル 14.3g(120mmol)、酢酸エチル 350mLからなる溶液を-15℃に冷却し、Fmoc-Ser-OBzl 25g(60mmol)、酢酸エチル 100mLからなる溶液を10分かけて滴下した。そのままの温度で5分撹拌した後、ピリジン 23.7g(300mmol)を10分かけて滴下した。そのままの温度で5分撹拌した後、室温で24時間撹拌した。反応混合物に水 200mLを加えた後、有機層と水層に分離した。得られた有機層を1N-塩酸 200mLおよび10%食塩水 200mLで洗浄した後、減圧下濃縮することで(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダイトカルボン酸ベンジル 28.0gの粗精製物をジアステレオ混合物として得た。
光学純度:99.9%ee(検出波長205nm、保持時間4.02分、高速液体クロマトグラフィーの条件3)
UV強度比:95.2%(検出波長205nm、保持時間3.31分、高速液体クロマトグラフィーの条件2)
1H-NMR(CDCl3、400MHz)δ:4.22-4.34(1H、m)、4.46(1H、dd、J=10.4,7.2)、4.58(1H、dd、J=10.4,7.2)、4.70-4.96(3H、m)、5.20-5.32(2H、m)、7.28-7.38(7H、m)、7.42(2H、t、J=7.6)、7.62-7.80(4H、m)
1) (4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダートカルボン酸ベンジル 1.00g(2.0mmol)、リン酸二水素ナトリウム 1.00g、2-プロパノール 4mL、2,2,2-トリフルオロエタノール 2mLからなる混合物を70℃に加熱しながら6時間撹拌した。反応混合物に酢酸エチル 20mL、10%食塩水 20mLを加えた後、有機層と水層に分離した。有機層をFmoc-Ser(i-Pr)-OBzl酢酸エチル溶液として得た。
UV強度比:7.7%(検出波長205nm、保持時間2.87分、高速液体クロマトグラフィーの条件2)
目的物が82.4%で生成し、2-プロパノールと反応せずにスルファミダートが開環したFmoc-Ser-OBzlが7.7%生成した。酸性塩(この場合はリン酸二水素ナトリウム)を用いた場合、同一出発原料を用い、酸性塩を使用していない実施例16と比較して、副生成物の生成が3倍近く減少した。
光学純度:99.9%ee(検出波長205nm、保持時間3.25分、高速液体クロマトグラフィーの条件3)
UV強度比:87.0%(検出波長205nm、保持時間2.70分、高速液体クロマトグラフィーの条件2)
(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダートカルボン酸ベンジル 50mg(0.10mmol)、2-プロパノール 0.30mLからなる混合物を80℃に加熱しながら2時間撹拌し、反応混合物をHPLCを用いて分析した。
(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダートカルボン酸ベンジル 50mg(0.10mmol)、リン酸二水素ナトリウム 24mg、1-プロパノール 0.20mL、2,2,2-トリフルオロエタノール 0.10mLからなる混合物を70℃に加熱しながら2時間撹拌し、反応混合物をHPLCを用いて分析した。
UV強度比:3.5%(検出波長205nm、保持時間2.87分、高速液体クロマトグラフィーの条件2)
目的物が81.3%で生成し、目的物がさらに1-プロパノールと反応しエステル交換がおこった副生成物(Fmoc-Ser(n-Pr)-O(n-Pr)が1.4%生成した。 酸性塩(この場合はリン酸二水素ナトリウム) を用いた場合、同一出発原料を用い、酸性塩を用いずに反応を行った実施例18と比較して、目的物の収率が10%近く改善し、副生成物の生成が6倍近く減少した。
(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダートカルボン酸ベンジル 0.59g(1.23mmol)、1-プロパノール 2.4mL、2,2,2-トリフルオロエタノール 1.2mLからなる混合物を70℃に加熱しながら2時間撹拌し、反応混合物をHPLCを用いて分析した。
(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダートカルボン酸ベンジル 0.59g(1.23mmol)、2-メチルプロパン-1,2-ジオール 2.4mL、2,2,2-トリフルオロエタノール 1.2mLからなる混合物を70℃に加熱しながら4時間撹拌し、反応混合物をHPLCを用いて分析した。
(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダートカルボン酸ベンジル 50mg(0.1mmol)、ピリジン塩酸塩 23mg(0.2mmol)、1-プロパノール 0.20mL、2,2,2-トリフルオロエタノール 0.10mLからなる混合物を70℃に加熱しながら1時間撹拌し、反応混合物をHPLCを用いて分析した。
UV強度比:91.5%(検出波長205nm、保持時間3.36分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSポジティブモード)m/z:436.41(M+H+)
酸性塩としてピリジン塩酸塩を用いたところ、原料と1-プロパノールが反応せずにピリジン塩酸塩由来の塩化物イオンにより開環したクロロ体(Fmoc-Ala(Cl)-OBzl)が得られた。酸性塩としてリン酸二水素ナトリウムを用いると目的物を効率的に与えることがわかった。
実施例21:(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダート-4-カルボン酸第三ブチル
1) 塩化チオニル 1.61g(13.5mmol)、ジクロロメタン 20mLからなる溶液を-40℃に冷却し、Fmoc-Ser-Ot-Bu 2.00g(5.2mmol)、ジクロロメタン 5mLからなる溶液を5分かけて滴下した。そのままの温度で15分撹拌した後、ピリジン 2.68g(33.8mmol)を5分かけて滴下した。そのままの温度で20分撹拌した後、0℃で20分、室温で1時間30分撹拌した。反応混合物に水 30mLを加えた後、有機層と水層に分離した。得られた水層にジクロロメタン 20mLを加えて、再度有機層と水層に分離した。得られた有機層を併せて5%NaHCO3 30mLおよび10%食塩水 30mLで洗浄した後、減圧下濃縮することで(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダイトカルボン酸第三ブチル 2.22gの粗精製物をジアステレオ混合物として得た。
UV強度比:96.9%(検出波長205nm、保持時間3.24分、高速液体クロマトグラフィーの条件1)
1H-NMR(CDCl3、400MHz)δ:1.50(9H、s)、4.35(1H、t、J=7.6)、4.48(1H、dd、J=10.4,7.6)、4.61(1H、dd、J=10.4,7.6)、4.70-4.88(3H、m)、7.31-7.37(2H、m)、7.39-7.45(2H、m)、7.58-7.80(4H、m)
ESI(LC/MSネガティブモード)m/z:444.33(M‐H+)
実施例22:(4S)-5-メチル-1,2,5-スルファミダート-4-カルボン酸ベンジル
1) 塩化チオニル 2.38g(20mmol)、ジクロロメタン 50mLからなる溶液を-15℃に冷却し、H-MeSer-OBzl塩酸塩 2.50g(10mmol)を加えた。そのままの温度で5分撹拌した後、ピリジン 4.75g(60mmol)を5分かけて滴下した。そのままの温度で5分撹拌した後、室温で1時間撹拌した。反応混合物に水 25mLを加えた後、有機層と水層に分離した。得られた有機層を1N-塩酸 25mLおよび10%食塩水 25mLで洗浄した後、減圧下濃縮することで(4S)-5-メチル-1,2,5-スルファミダイトカルボン酸ベンジル 2.06gの粗精製物をジアステレオ混合物として得た。
光学純度:99.9%ee(検出波長205nm、保持時間2.58分、高速液体クロマトグラフィーの条件3)
UV強度比:96.3%(検出波長205nm、保持時間2.29分、高速液体クロマトグラフィーの条件2)
1H-NMR(CDCl3、400MHz)δ:2.95(3H、s)、4.10(1H、dd、J=7.6、6.4)、4.60-4.72(2H、m)、5.24(1H、d、J=12.0)、5.28(1H、d、J=12.0)、7.32-7.44(5H、m)
(4S)-5-メチル-1,2,5-スルファミダートカルボン酸ベンジル 0.28g(1.0mmol)、2-プロパノール 5.6mLからなる混合物を90℃に加熱しながら13時間撹拌した。反応混合物にジクロロメタン 16.4mL、5%炭酸水素ナトリウム水 16.4mLを加えた後、有機層と水層に分離した。有機層をH-MeSer(n-Pr)-OBzlを酢酸エチル溶液として得て、HPLCを用いて分析した。
UV強度比:91.8%(検出波長205nm、保持時間1.65分、高速液体クロマトグラフィーの条件1)
ESI(LC/MSポジティブモード)m/z:252.48(M+H+)
1)(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダートカルボン酸ベンジル 100mg(0.208mmol)、リン酸二水素ナトリウム 100mg、3,3,3-トリフルオロプロパン-1,2-ジオール 0.543g(4.17mmol)、2,2,2-トリフルオロエタノール 0.2mLからなる混合物を70℃に加熱しながら48時間撹拌した。反応混合物に酢酸エチル 1mL、2N塩酸水 1mLを加えた後、有機層と水層に分離した。水層はさらに酢酸エチル 1mLを加えた後、有機層と水層に分離した。得られた有機層を併せてFmoc-Ser(CH2CH(OH)CF3)-OBzl酢酸エチル溶液とした。
UV強度比:50.9%(検出波長205nm、保持時間3.24分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSポジティブモード)m/z:530.59(M+H+)
UV強度比:52.3%(検出波長205nm、保持時間2.52分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSネガティブモード)m/z:438.39(M‐H+)
(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダートカルボン酸第三ブチル 50mg(0.11mmol)、リン酸二水素ナトリウム 50mg、ベンジルアルコール 0.30mL(2.91mmol)からなる混合物を90℃に加熱しながら2時間撹拌した後、反応混合物をHPLCを用いて分析した。
UV強度比:39.5%(検出波長205nm、保持時間2.93分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSネガティブモード)m/z:416.43(M‐H+)
UV強度比:22.9%(検出波長205nm、保持時間3.72分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSポジティブモード)m/z:474.68(M+H+)
UV強度比:22.9%(検出波長205nm、保持時間3.65分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSポジティブモード)m/z:474.68(M+H+)
(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダートカルボン酸第三ブチル 50mg(0.11mmol)、リン酸二水素ナトリウム 50mg、3-フルオロベンジルアルコール 0.30mL(2.78mmol)からなる混合物を90℃に加熱しながら2時間撹拌した後、反応混合物をHPLCを用いて分析した。
UV強度比:38.4%(検出波長205nm、保持時間2.95分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSネガティブモード)m/z:434.51(M‐H+)
UV強度比:2.90%(検出波長205nm、保持時間3.71分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSポジティブモード)m/z:492.65(M+H+)
UV強度比:8.35%(検出波長205nm、保持時間3.71分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSポジティブモード)m/z:544.67(M+H+)
(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダートカルボン酸第三ブチル 45mg(0.11mmol)、リン酸二水素ナトリウム 45mg、2-チオフェンメタノール 0.27mL(2.86mmol)からなる混合物を室温で48時間撹拌した後、反応混合物をHPLCを用いて分析した。
Fmoc-Ser(CH 2 -2-チエニル)-OH
UV強度比:8.61%(検出波長205nm、保持時間2.85分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSポジティブモード)m/z:422.37(M+H+)
UV強度比:23.3%(検出波長205nm、保持時間3.63分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSネガティブモード)m/z:480.70(M‐H+)
(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダートカルボン酸第三ブチル 45mg(0.11mmol)、リン酸二水素ナトリウム 45mg、2-フルフリルアルコール 0.27mL(3.11mmol)からなる混合物を室温で48時間撹拌した後、反応混合物をHPLCを用いて分析した。
Fmoc-Ser(CH 2 -2-furyl)-Ot-Bu
UV強度比:18.6%(検出波長205nm、保持時間3.49分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSポジティブモード)m/z:464.64(M+H+)
実施例29:(4S)-3-t-ブトキシカルボニル-2,2-ジオキソ-1,2,3-オキサチアジナン-4-カルボン酸ベンジル
1) 塩化チオニル 7.46g(62.7mmol)、酢酸エチル 200mLからなる溶液を-15℃に冷却し、Boc-homoSer-OBzl 10.00g(31.3mmol)、酢酸エチル 30mLからなる溶液を5分かけて滴下した。そのままの温度で5分撹拌した後、ピリジン 12.4g(157mmol)を5分かけて滴下した。-15℃で5分撹拌した後、室温で3時間撹拌した。反応混合物に水 100mLを加えた後、有機層と水層に分離した。得られた有機層に1N HCl 100mLを加えて、再度有機層と水層に分離した。得られた有機層を10%食塩水 100mLで洗浄した後、減圧下濃縮することで(4S)-3-t-ブトキシカルボニル-2-オキソ-1,2,3-オキサチアジナン-4-カルボン酸ベンジル 10.90gをジアステレオ混合物の粗精製物として得た。
光学純度:99.9%ee(検出波長205nm、保持時間:2.90分、高速液体クロマトグラフィーの条件3)
UV強度比:96.3%(検出波長205nm、保持時間2.83分、高速液体クロマトグラフィーの条件2)
1H-NMR(CDCl3、400MHz)δ:1.43(9H、s)、2.35-2.50(1H、m)、2.60-2.70(1H,m)、4.55-4.65(1H,m)、4.72(1H、dt、J=11.2,4.8)、5.21(2H、d、J=2.4)、5.24(1H、dd、5.6,2.4)、7.30-7.40(5H、m)
光学純度:99.9%ee(検出波長205nm、保持時間:3.07分、高速液体クロマトグラフィーの条件5)
UV強度比:98.3%(検出波長205nm、保持時間3.71分、高速液体クロマトグラフィーの条件2)
1H-NMR(CDCl3、400MHz)δ:1.44(9H、s)、2.08-2.20(1H、m)、2.28-2.40(1H,m)、3.57(2H、t、7.2)、4.43-4.53(1H,m)、5.08-5.20(1H、m)、4.18(2H、dd、J=14.8,12.0)、7.31-7.41(5H、m)
ESI(LC/MSポジティブモード)m/z:328.57、330.55(M+H+)
(4S)-3-t-ブトキシカルボニル-2,2-ジオキソ-1,2,3-オキサチアジナン-4-カルボン酸ベンジル 50mg(0.134mmol)、1-プロパノール 1mLからなる混合物を80℃に加熱しながら40時間撹拌した後、反応混合物をHPLCを用いて分析した。
UV強度比:87.5%(検出波長205nm、保持時間1.50分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSポジティブモード)m/z:252.60(M+H+)
(4S)-3-t-ブトキシカルボニル-2,2-ジオキソ-1,2,3-オキサチアジナン-4-カルボン酸ベンジル 50mg(0.134mmol)、2-プロパノール 1mLからなる混合物を80℃に加熱しながら40時間撹拌した後、反応混合物をHPLCを用いて分析した。
UV強度比:84.2%(検出波長205nm、保持時間1.47分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSポジティブモード)m/z:252.60(M+H+)
(4S)-3-t-ブトキシカルボニル-2,2-ジオキソ-1,2,3-オキサチアジナン-4-カルボン酸ベンジル 50mg(0.134mmol)、3-メチルブタノール 1mLからなる混合物を80℃に加熱しながら40時間撹拌した後、反応混合物をHPLCを用いて分析した。
UV強度比:84.8%(検出波長205nm、保持時間1.84分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSポジティブモード)m/z:280.62(M+H+)
(4S)-3-t-ブトキシカルボニル-2,2-ジオキソ-1,2,3-オキサチアジナン-4-カルボン酸ベンジル 50mg(0.134mmol)、2-メチルプロパン-1,2-ジオール 1mLからなる混合物を80℃に加熱しながら40時間撹拌した後、反応混合物をHPLCを用いて分析した。
UV強度比:70.9%(検出波長205nm、保持時間1.29分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSポジティブモード)m/z:282.60(M+H+)
実施例34:(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダート-4-酢酸第三ブチル
1) 塩化チオニル 2.38g(20.0mmol)、酢酸エチル 80mLからなる溶液を-40℃に冷却し、Fmoc-Asp(Ot-Bu)-OL 4.00g(10.0mmol)、ジクロロメタン 12mLからなる溶液を5分かけて滴下した。そのままの温度で5分撹拌した後、ピリジン 3.96g(50.0mmol)を5分かけて滴下した。-40℃で5分撹拌した後、室温で2間撹拌した。反応混合物に水 40mLを加えた後、有機層と水層に分離した。得られた有機層に1N HCl 40mLを加えて、再度有機層と水層に分離した。得られた有機層を10%食塩水 40mLで洗浄した後、減圧下濃縮することで(4R)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダイト-4-酢酸第三ブチル 4.65gをジアステレオ混合物の粗精製物として得た。
光学純度:99.9%ee(検出波長205nm、保持時間:3.63分、高速液体クロマトグラフィーの条件3)
UV強度比:79.2%(検出波長205nm、保持時間3.43分、高速液体クロマトグラフィーの条件2)
1H-NMR(CDCl3、400MHz)δ:1.44(9H、s)、2.68-2.80(1H、m)、2.82-2.96(1H,m)、4.33(1H、t、J=7.2)、4.48-4.53(4H、m)、4.81(1H、dd、9.6,6.0)、7.31-7.45(4H、m)、7.66-7.79(4H、m)
ESI(LC/MSネガティブモード)m/z:504.49(M+HCO2 ‐)
(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダート-4-酢酸第三ブチル 50mg(0.108mmol)、リン酸二水素ナトリウム 50mg、1-プロパノール 1mLからなる混合物を70℃に加熱しながら2時間撹拌した後、反応混合物をHPLCを用いて分析した。
光学純度:99.9%ee(検出波長205nm、保持時間:3.21分、高速液体クロマトグラフィーの条件3)
UV強度比:24.6%(検出波長205nm、保持時間2.67分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSネガティブモード)m/z:428.42(M+HCO2 ‐)
光学純度:99.9%ee(検出波長205nm、保持時間:3.89分、高速液体クロマトグラフィーの条件3)
UV強度比:29.9%(検出波長205nm、保持時間3.61分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSポジティブモード)m/z:440.70(M+H+)
(4S)-5-(9-フルオレニル)メトキシカルボニル-1,2,5-スルファミダート-4-酢酸第三ブチル 30mg(0.065mmol)、リン酸二水素ナトリウム 30mg、2-プロパノール 0.6mLからなる混合物を70℃に加熱しながら2時間撹拌した後、反応混合物をHPLCを用いて分析した。
光学純度:99.9%ee(検出波長205nm、保持時間:3.16分、高速液体クロマトグラフィーの条件3)
UV強度比:7.2%(検出波長205nm、保持時間2.64分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSネガティブモード)m/z:382.63(M‐H+)
光学純度:99.9%ee(検出波長205nm、保持時間:3.82分、高速液体クロマトグラフィーの条件3)
UV強度比:22.2%(検出波長205nm、保持時間3.57分、高速液体クロマトグラフィーの条件2)
ESI(LC/MSポジティブモード)m/z:440.70(M+H+)
実施例37:(5S)-3-(9-フルオレニル)メトキシカルボニル-2,2-ジオキソ-1,2,3-オキサチアジナン-5-カルボン酸ベンジル
1) 塩化チオニル 2.38g(20.0mmol)、酢酸エチル 80mLからなる溶液を-40℃に冷却し、(2S)-3-(9-フルオレニル)メトキシカルボニルアミノ‐2‐ヒドロキシメチルプロピオン酸ベンジル 4.32g(10.0mmol)、ジクロロメタン 12mLからなる溶液を5分かけて滴下する。そのままの温度で5分撹拌してから、ピリジン 3.96g(50.0mmol)を5分かけて滴下する。-40℃で5分撹拌してから、室温で2間撹拌する。反応混合物に水 40mLを加えた混合物を有機層と水層に分離する。得られた有機層に1N HCl 40mLを加えた混合物を再度有機層と水層に分離する。得られた有機層を10%食塩水 40mLで洗浄してから減圧下濃縮することで(5S)-3-(9-フルオレニル)メトキシカルボニル-2,2-ジオキソ-1,2,3-オキサチアジナン-5-カルボン酸ベンジルをジアステレオ混合物の粗精製物として得る。
(5S)-3-(9-フルオレニル)メトキシカルボニル-2,2-ジオキソ-1,2,3-オキサチアジナン-5-カルボン酸ベンジル 50mg(0.104mmol)、リン酸二水素ナトリウム 50mg、1-プロパノール 1mLからなる混合物を70℃に加熱しながら2時間撹拌してから反応混合物をHPLCを用いて分析する。
(5S)-3-(9-フルオレニル)メトキシカルボニル-2,2-ジオキソ-1,2,3-オキサチアジナン-5-カルボン酸ベンジル 50mg(0.104mmol)、リン酸二水素ナトリウム 50mg、2-プロパノール 1mLからなる混合物を70℃に加熱しながら2時間撹拌してから反応混合物をHPLCを用いて分析する。
実施例40:(5R)-3-(9-フルオレニル)メトキシカルボニル-2,2-ジオキソ-1,2,3-オキサチアジナン-5-カルボン酸ベンジル
1) 塩化チオニル 2.38g(20.0mmol)、酢酸エチル 80mLからなる溶液を-40℃に冷却し、(2R)-3-(9-フルオレニル)メトキシカルボニルアミノ‐2‐ヒドロキシメチルプロピオン酸ベンジル 4.32g(10.0mmol)、ジクロロメタン 12mLからなる溶液を5分かけて滴下する。そのままの温度で5分撹拌してから、ピリジン 3.96g(50.0mmol)を5分かけて滴下する。-40℃で5分撹拌してから、室温で2間撹拌する。反応混合物に水 40mLを加えた混合物を有機層と水層に分離する。得られた有機層に1N HCl 40mLを加えた混合物を再度有機層と水層に分離する。得られた有機層を10%食塩水 40mLで洗浄してから減圧下濃縮することで(5R)-3-(9-フルオレニル)メトキシカルボニル-2,2-ジオキソ-1,2,3-オキサチアジナン-5-カルボン酸ベンジルをジアステレオ混合物の粗精製物として得る。
(5R)-3-(9-フルオレニル)メトキシカルボニル-2,2-ジオキソ-1,2,3-オキサチアジナン-5-カルボン酸ベンジル 50mg(0.104mmol)、リン酸二水素ナトリウム 50mg、1-プロパノール 1mLからなる混合物を70℃に加熱しながら2時間撹拌してから反応混合物をHPLCを用いて分析する。
Claims (15)
- 以下の工程を含む、一般式(I):
[式中、
R1は置換基を有していてもよいC1-C6アルキル、置換基を有していてもよいC3-C8シクロアルキル、置換基を有していてもよいアラルキル、または置換基を有していてもよいヘテロアラルキルであり、
R2はC1-C6アルキルまたはアミノ基の保護基であり、
R4はカルボキシル基の保護基であり、
L1は単結合または-CH2-であり、
L2は単結合または-CH2-であり、
nは1または2であり、
但し、L1が-CH2-である場合、L2は単結合であり、L2が-CH2-である場合、L1は単結合である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を製造する方法:
工程A:環化試薬と、一般式(V):
[式中、R2、R4、L1、L2、及びnは上記と同義である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物とを反応させて、一般式(IV):
[式中、R2、R4、L1、L2、及びnは上記と同義である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を得る工程、
工程B:一般式(IV)で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を酸化剤と反応させて、一般式(II):
[式中、R2、R4、L1、L2、及びnは上記と同義である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を得る工程、および
工程C:一般式(II)で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物をR1OH(式中、R1は上記と同義である)と反応させて、一般式(I)で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を得る工程。 - 以下の工程を含む、一般式(I):
[式中、
R1は置換基を有していてもよいC1-C6アルキル、置換基を有していてもよいC3-C8シクロアルキル、置換基を有していてもよいアラルキル、または置換基を有していてもよいヘテロアラルキルであり、
R2は水素であり、
R4はカルボキシル基の保護基であり、
L1は単結合または-CH2-であり、
L2は単結合または-CH2-であり、
nは1または2であり、
但し、L1が-CH2-である場合、L2は単結合であり、L2が-CH2-である場合、L1は単結合である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を製造する方法:
工程A:環化試薬と、一般式(V’):
[式中、R2’はアミノ基の保護基であり、R4、L1、L2、及びnは上記と同義である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物とを反応させて、一般式(IV’):
[式中、R2’、R4、L1、L2、及びnは上記と同義である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を得る工程、
工程B:一般式(IV’)で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を酸化剤と反応させて、一般式(II’):
[式中、R2’、R4、L1、L2、及びnは上記と同義である。]
で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を得る工程、および
工程C:一般式(II’)で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物をR1OH(式中、R1は上記と同義である)と反応させて、前記一般式(I)で表される化合物、その化学的に許容される塩、またはそれらの溶媒和物を得る工程。 - R1が、ハロゲン、ハロゲンで置換されていてもよいアリール、または水酸基から独立して選択される1つまたは複数の置換基を有していてもよい、C1-C6アルキル、C3-C8シクロアルキル、アラルキル、またはヘテロアラルキルであり、
R2が、Boc基、Fmoc基、Cbz基またはAlloc基から選択され、
R4が、ベンジルまたはtert-Buである、
請求項1、3、または4に記載の方法。 - R1が、ハロゲン、ハロゲンで置換されていてもよいアリール、または水酸基から独立して選択される1つまたは複数の置換基を有していてもよい、C1-C6アルキル、C3-C8シクロアルキル、アラルキル、またはヘテロアラルキルであり、
R2’が、Boc基、Fmoc基、Cbz基、またはAlloc基から選択され、
R4が、ベンジル、またはtert-Buである、
請求項2~4のいずれか一項に記載の方法。 - R3が、Boc基、Fmoc基、Cbz基、Alloc基、またはメチルから選択される、請求項4に記載の方法。
- 工程Bで用いられる酸化剤が、過ヨウ素酸塩とルテニウム触媒の組み合わせである、請求項1~7のいずれか一項に記載の方法。
- 一般式(IV)で表される化合物、その化学的に許容される塩、もしくはそれらの溶媒和物、または一般式(IV’)で表される化合物、その化学的に許容される塩、もしくはそれらの溶媒和物に対して、1.5~5当量の過ヨウ素酸塩、および0.01~0.2当量のルテニウム触媒が用いられる、請求項8の方法。
- 工程Bが、アセトニトリルと水の混合溶媒中で行われる、請求項1~9のいずれか一項に記載の方法。
- 工程Cが、酸性塩の存在下で行われる、請求項1~10のいずれか一項に記載の方法。
- 工程Cが、2、2、2-トリフルオロエタノール、1,1,1,3,3,3-ヘキサフルオロ-2-プロパノール、または2-メチルテトラヒドロフラン中で行われる、請求項1~11のいずれか一項に記載の方法。
- 工程Cが、反応混合物を有機溶媒で抽出する工程をさらに含み、その抽出液が濃縮乾固されずに工程Dで用いられる、請求項1~12のいずれか一項に記載の方法。
- 工程Dが、Pd触媒の存在下、および/または水素ガス、ギ酸、またはギ酸アンモニウムの存在下で行われる、請求項3~13のいずれか一項に記載の方法。
- 工程Aが、酢酸エチル、酢酸イソプロピル、または酢酸ブチル中で行われ、かつ一般式(V)で表される化合物、その化学的に許容される塩、もしくはそれらの溶媒和物、または一般式(V’)で表される化合物、その化学的に許容される塩、もしくはそれらの溶媒和物に対して、1.5~5当量の塩化チオニルが用いられる、請求項1~14のいずれか一項に記載の方法。
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| CN112479933A (zh) * | 2020-12-11 | 2021-03-12 | 吉尔生化(上海)有限公司 | 一种n-芴甲氧羰基-3-氯-丙氨酸苄酯的制备方法 |
| CN114685277A (zh) * | 2020-12-31 | 2022-07-01 | 苏州瑞博生物技术股份有限公司 | 化合物及羟基丙酸盐类化合物的纯化方法 |
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| CN112969683A (zh) | 2021-06-15 |
| JP7279073B2 (ja) | 2023-05-22 |
| KR102841441B1 (ko) | 2025-07-31 |
| JP7685551B2 (ja) | 2025-05-29 |
| CN112969683B (zh) | 2024-05-14 |
| US20220017456A1 (en) | 2022-01-20 |
| EP3878836A4 (en) | 2022-08-10 |
| EP3878836B1 (en) | 2025-07-23 |
| US20250263365A1 (en) | 2025-08-21 |
| US12312297B2 (en) | 2025-05-27 |
| KR20250119653A (ko) | 2025-08-07 |
| JP2023099607A (ja) | 2023-07-13 |
| KR20210088619A (ko) | 2021-07-14 |
| JP2025113333A (ja) | 2025-08-01 |
| JPWO2020095983A1 (ja) | 2021-10-07 |
| EP3878836A1 (en) | 2021-09-15 |
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