WO1999007874A1 - Process for producing lh-rh derivatives - Google Patents
Process for producing lh-rh derivatives Download PDFInfo
- Publication number
- WO1999007874A1 WO1999007874A1 PCT/JP1997/002705 JP9702705W WO9907874A1 WO 1999007874 A1 WO1999007874 A1 WO 1999007874A1 JP 9702705 W JP9702705 W JP 9702705W WO 9907874 A1 WO9907874 A1 WO 9907874A1
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- WO
- WIPO (PCT)
- Prior art keywords
- leu
- ser
- arg
- pro
- tyr
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
- C07K5/04—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing only normal peptide links
- C07K5/08—Tripeptides
- C07K5/0821—Tripeptides with the first amino acid being heterocyclic, e.g. His, Pro, Trp
- C07K5/0825—Tripeptides with the first amino acid being heterocyclic, e.g. His, Pro, Trp and Glp-amino acid; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K7/00—Peptides having 5 to 20 amino acids in a fully defined sequence; Derivatives thereof
- C07K7/04—Linear peptides containing only normal peptide links
- C07K7/23—Luteinising hormone-releasing hormone [LHRH]; Related peptides
Definitions
- the present invention relates to a method for efficiently producing an LH-RH derivative, which is a peptide useful as a medicine, using an enzyme.
- Luteinizing hormone (LH) and follicle-stimulating hormone (FSH) are released from the anterior pituitary gland under the control of the luteinizing hormone-releasing hormone LH-RH produced in the hypothalamus.
- LH-RH and its derivatives have gonadotropin-secreting activity and can inhibit gonadal function by continuous administration. For example, endometriosis, central precocious puberty, infertility, prostate cancer, etc. It has been applied as a prophylactic and therapeutic agent for or.
- Buserelin Japanese Patent Publication No. 60-9519
- Goserelin Japanese Patent Publication No. 61-13480
- Leuprorelin Japanese Patent Publication No. 53-14072
- Nafarelin Japanese Patent Publication No. 63-14072
- a peptide fragment having a partial sequence corresponding to the polypeptide is formed by a liquid phase method or a solid phase method, and each fragment is further coupled in a liquid phase.
- Chemical synthesis method by synthesis method JP-B-56-47175, JP-A-4-19-1468, JP-B-57-29462, JP-B-57-25540, JP-B-63-17839, JP-B-63-45398, JP-B-48-40770, JP-A-50-88069, JP-A-49-41375, JP-A-49-41376, JP-A-48-99170 JP, JP-B-52-20996, JP-A-49-35381, JP-B-52-8831, JP-B-57-668, JP-B-53-14072, JP-B-57-26506 Gazettes, Japanese Patent Publication No. 60-22720, Japanese Patent Publication No.
- An object of the present invention is to provide a method for efficiently producing LH-RH derivatives in large quantities at low cost.
- the present invention provides a compound represented by the general formula (1):
- R 1 represents lower alkyl
- X represents an amino acid selected from the group consisting of D-Leu, D-Ser (But), D-Trp, (2-naphthyl) -D-Ala, and Gly
- Y represents Gly - NH ", Azgl y (Azagurishin) - NH 2 or NHR 2 (R 2 is lower alkyl.) shows a).
- R 1 is an alkyl group having 1 to 3 carbon atoms
- R 2 is an alkyl group having 1 to 3 carbon atoms.
- the above chymotrypsin or Is characterized in that the enzyme selected from the group consisting of chymotrypsin-like enzymes is chymotrypsin.
- R 1 represents lower alkyl
- X represents an amino acid selected from the group consisting of D-Leu, D-Ser (But), D-Trp, (2-naphthyl) -D-Ala, and Gly
- Y represents Giy-NH 2 , Azgly-NH 2 or NHR 2
- the solvent obtained by mixing the water or the buffer and the organic solvent is a mixed solvent of water or the buffer and a water-miscible organic solvent, or an organic solvent that partially mixes the water or the buffer with water. It is a saturated mixed solvent.
- R 1 represents lower alkyl
- X is D- Leu, D-Ser (But ), D-Trp, (2- naphthyl) - D-Ala, and the amino acid selected from the group consisting of Gly, Y is Gly- ⁇ 2, Azgly-Cafe 2 or NHR 2 (R 2 is lower alkyl.)
- the LH-RH derivative is represented by the general formula (10) (SEQ ID NO: 1)
- Gly at the 6th and 10th positions of LH-RH represented by the above is substituted with another amino acid, special amino acid or modified amino acid.
- the amino acid at the position corresponding to the Giy at position 6 (hereinafter referred to as X) is not particularly limited as long as it is a D-form amino acid or a modified amino acid obtained by modifying these amino acids.
- Specific D-form amino acids include D-Leu, D-Trp, D-Ala, D-Phe, D-Val, and D-His! )
- Body amino acids, and modified amino acids include D-Ser (But), (2-naphthyl) -DAla, and the like.
- X may be an L-form amino acid.
- the amino acid is selected from the group consisting of: L-amino acid and Gly when it is an L-form amino acid.
- Gly at position 10 (hereinafter referred to as Y) is preferably Gly-NH 2 , Azgly-NH 2 or NHR 2 (R 2 is lower alkyl).
- “Lower alkyl” means alkyl having 1 to 3 carbon atoms, and specific examples include methyl, ethyl, propyl and isopropyl.
- R 1 is preferably a methyl or ethyl group, and R 2 is preferably an ethyl or methyl group.
- HOSu N-hydroxysuccinic acid imid
- HOBt 1-hydroxybenzotriazole
- the peptide fragment represented by the general formula (1) corresponds to the first to third amino acid residues of the amino acid sequence of the LH-RH derivative represented by the general formula (3).
- the peptide fragment represented by the general formula (2) corresponds to the amino acid residue at the 4-position or lower in the amino acid sequence of the LH-RH derivative represented by the general formula (3).
- the peptide fragment represented by the general formula (1) or the peptide fragment represented by the general formula (2) can be synthesized by a known method for peptide synthesis. For example, "The Pept i des", Volume 1 (1966) [Schreder and Luhke, Academic Press, New York, USA], or "Peptide synthesis"
- the functional groups that should not be involved in the reaction are protected by ordinary protecting groups, and after the reaction, the protecting groups are Is detached.
- the functional groups involved in the reaction are usually activated.
- Protecting groups for the amino group include benzyloxycarbonyl (Z), t-butyloxy. Cicarbonyl (Boc), t-Amyloxycarbonyl (Aoc), Isocarbonyloxycarbonyl, P-methoxybenzyloxycarbonyl, 2-Chloro-benzyloxycarbonyl, Adamantyloxycarbonyl, Trifluoro Examples include roacetyl, phthaloyl, formyl, 0-nitrophenylsulfenyl, diphenylphosphinothioyl, and the like.
- Boc Boc
- D-Ser (But) When D-Ser (But) is bonded, use Z group to remove only Z group without removing But (t-butyl) group. Can be.
- carboxyl-protecting groups include alkyl esters (eg, methyl ester, ethyl ester, propyl ester, butyl ester, tert-butyl ester, etc.), benzyl ester, P-nitrobenzyl ester, methylbenzyl ester, p-chloro
- Examples include benzyl ester, benzhydryl ester, benzyloxycarbonyl hydrazide, tert-butyloxycarbonyl hydrazide, and trityl hydrazide. When hydrazide is formed, it is preferable to use a methyl ester or ethyl ester.
- Activated carboxyl groups involved in peptide bonds include, for example, the corresponding acid chloride, acid anhydride or mixed acid anhydride, azide, active ester
- the peptide bond formation reaction can be carried out in the presence of a condensing agent, for example, a carbodiimide reagent such as dicyclohexyl carbodiimide or carbodiimidazole—tetraethyl pyrophosphite.
- a condensing agent for example, a carbodiimide reagent such as dicyclohexyl carbodiimide or carbodiimidazole—tetraethyl pyrophosphite.
- proteolytic enzymes have been mainly used for cleavage of peptide bonds, but it has been known for a long time that they can also be involved in the reverse reaction of peptide bond formation.
- Enzymatic synthesis of long-chain peptides is limited to the case where the structure has an amino acid with a limited substrate specificity or the case where an enzyme having a limited substrate specificity is used.
- Common enzymes such as these are anti-peptides It is rarely used. Therefore, enzymatic reactions are mainly used for relatively short-chain peptide bonds such as oligopeptides, but it takes time to study synthesis conditions.
- Enzyme synthesis may solve the above-mentioned problems in chemical synthesis depending on the conditions, and it may be a very useful method if performed under mild conditions that enable mass production.
- the present invention allows the peptide fragment represented by the general formula (1) to react with the peptide fragment represented by the general formula (2) in the presence of chymotrypsin or a chymotrypsin-like enzyme.
- the LH-RH derivative represented by the general formula (3) was successfully produced by combining the two.
- the chymotrypsin used in the present invention is a kind of serine protease registered with the International Union of Biochemistry (I. U. B.) Enzyme Committee as enzyme number E3.4.2.1. Is the enzyme that is used. Chymotrypsin is commercially available from SIGMA and the like.
- the chymotrypsin-like enzyme refers to a protein degrading enzyme that recognizes aromatics such as Tyr and Phe, and specific examples include ⁇ -chymotrypsin.
- the use of chymotrypsin or a chymotrypsin-like enzyme is preferable because Trp, which is one of the recognition sites for chymotrypsin or chymotrypsin-degrading enzyme, is present in the L ⁇ -RH derivative.
- the reaction of chymotrypsin or chymotrypsin-like enzyme is usually carried out in a medium containing a buffer having a pH of about 5 to about 10, preferably a pH of about 6 to about 9, and more preferably a pH of about 7.5 to 8.5.
- the medium containing a buffer is a solvent using the buffer itself as a medium, a mixed solvent of various buffers described below and a water-miscible organic solvent, or a solvent in which these buffers are not completely mixed with water. Refers to a mixed solvent with an organic solvent.
- the buffer is not particularly limited as long as it has a pH value within the above range, and various buffers can be used.
- Tris-HCl buffer Tris-HCl buffer, McIlbe In buffer, phosphate buffer, ammonium acetate buffer,
- Buffers veronal buffers and the like.
- the buffer is usually used by mixing with a water-miscible organic solvent.
- water-miscible organic solvent examples include dimethylformamide (DMF), dimethylsulfoxide (DMS0), dimethylimidazolidinone (DMI), hexamethylphosphorinoletriamide (HMPA), and meta-
- DMF dimethylformamide
- DMS0 dimethylsulfoxide
- DI dimethylimidazolidinone
- HMPA hexamethylphosphorinoletriamide
- meta- there are nool (MeOH) and ethanol (EtOH).
- MeOH nool
- EtOH ethanol
- dimethylformamide methanol
- ethanol ethanol
- organic solvents that are completely miscible with water such as n-butanol (l-BuOH) and ethyl acetate (EtOAc), can also be used.
- l-BuOH n-butanol
- EtOAc ethyl acetate
- organic solvents may be used alone or in combination of two or more.
- the mixing ratio of the water-miscible organic solvent with water or a buffer solution is preferably 50% by volume or less from the viewpoint of reactivity.
- an immobilized enzyme for example, immobilized chymotrypsin using celite is used. In the case of using, it is preferable that the content is 80% by volume or more.
- the use of hydrated water of the above organic solvent has the advantage that the reaction efficiency of the enzyme is high.
- the reaction of the above-mentioned enzymes is usually performed in a temperature range in which chymotrypsin or a chymotrypsin-like enzyme operates, that is, generally in a range of about 0 to about 50 ° (preferably, about 0 ° C to about 20 ° C).
- a temperature range in which chymotrypsin or a chymotrypsin-like enzyme operates that is, generally in a range of about 0 to about 50 ° (preferably, about 0 ° C to about 20 ° C).
- the amount of chymotrypsin or chymotrypsin-like enzyme used is not particularly limited, and can be appropriately changed depending on the reaction conditions.
- about 50 mg to 50 g of substrate Using about 100 mg of chymotrypsin, the desired peptide can be synthesized in a range of about 75 to about 85% in one hour.
- chymotrypsin or chymotrypsin-like enzyme may be used by dissolving it in water or an appropriate buffer, or may be used by a general method such as a carrier binding method, a cross-linking method, an inclusive method, or the like. It may be immobilized by a method and used as an immobilized enzyme.
- the carrier used in the carrier binding method include polysaccharide derivatives such as cellulose, dextran, and agarose, polyacrylamide gel, celite, and porous glass.
- cross-linking reagent used in the cross-linking method examples include glutaraldehyde, bisdiazobenzidine, N, N-polymethylenebis-acetoamide, ⁇ , ⁇ -ethylenebismaleimide, and the like.
- Materials used in the entrapment method include polyacrylamide gel, polyacryl alcohol gel, starch, konjac powder, nylon, polyurea, polystyrene, ethylcellulose, collodion, and cellulose nitrate.
- the immobilization method is not limited to the method using these.
- LH—RH derivative represented by pGlu-His-Trp-Ser-Tyr-D-Ser (But) -Leu-Arg-Pro-NHEt (11) can be obtained.
- chymotrypsin may be immobilized on agarose according to a conventional method and used as the immobilized enzyme.
- the reaction solution can be easily removed from the reaction solution by passing the reaction solution through a filter such as a glass filter after completion of the reaction, and can be reused.
- the above LH-RH derivative can be obtained, and the obtained LH-RH derivative can be purified as follows.
- the LH_RH derivative produced by the method of the present invention can be desalted and purified according to a usual method.
- desalting can be performed by various methods utilizing the difference in molecular size from salts, such as gel filtration, ultrafiltration, and dialysis.
- ultrafiltration using a membrane made of cellulose acetate gel filtration using a Sephadex column such as Sephadex LH-20, Sephadex-1 60, Sephadex G-25, DEAE-cellulose, etc. It can be performed by ion exchange chromatography or the like.
- two types of liquids that do not mix with each other for example, n-butanol in water
- HPLC high-performance liquid chromatography
- HPLC high-performance liquid chromatography
- the LH-RH derivative produced by the method of the present invention is hydrophilic, it can be purified as follows using an organic solvent that is not completely miscible with water as described above.
- the reaction mixture reacted as described above is extracted with an organic solvent, water is added to the extract, and the mixture is solidified with a solvent such as ether.
- a solvent such as ether.
- n-butanol (n_BuOH) or the like is preferable.
- n_BuOH n-butanol
- These solvents are highly polar and have high extraction efficiency, and do not mix with water, which is advantageous for partition chromatography in the next step.
- To the reaction mixture (1, 200 mL) add about 1 to 4 n-butanol (300 mL), and perform partition chromatography with water in the reaction mixture.
- the extraction with n-butanol may be repeated as appropriate.
- the aqueous and organic layers are separately concentrated. At this time, since the peptide fragment of the above
- the crude product obtained from the organic layer by partition chromatography be solidified with getyl ether, ethyl acetate or the like because the LH-RH derivative is hardly soluble in these solvents.
- the solidified crude product is dissolved in a suitable buffer such as, for example, ammonium acetate, and fractionated by column chromatography using a suitable stationary phase and a mobile phase.
- a weak cation exchange resin such as CM cellulose or a strong cation resin such as SP is used as the stationary phase, an interaction due to Arg residues contained in LH-RH can be obtained.
- the mobile phase using the same buffer as that in which the solidified crude product was dissolved, increasing the salt concentration with a linear gradient has the advantage of increasing the yield.
- a 0.01 M aqueous solution of ammonium acetate and a 0.1 M aqueous solution of ammonium acetate can be used.
- the obtained eluate can be obtained by purifying the stationary phase and the eluent appropriately by HPLC and selecting the eluent.
- HPLC a 0DS silica column such as TSK gel ODS-120T can be used as the stationary phase, and the use of a 0DS silica column is optimal.
- 0.1% TFA-acetonitrile or the like can be used as the mobile phase.
- the content of acetonitrile is changed from 0.1% TFA at the start to 20% acetonitrile by 1% per minute to obtain a linear concentration gradient of 0.1% TFA to 50% acetonitrile.
- LH-RH peptide is good. Purification is not limited to the above purification method. When immobilized enzymes are used, they can be subjected to ion exchange without performing partition chromatography.
- the method of the present invention has the following advantages as compared with the conventionally known methods for producing LH-RH derivatives, and is extremely industrially useful.
- the LH-RH derivative can be converted into a pharmaceutically acceptable salt such as an acetate, a hydrochloride, a phosphate and the like, if necessary.
- the obtained pure peptide was identified by measuring the retention time of high performance liquid chromatography (HPLC), measuring the optical rotation, and analyzing amino acids. These measurements were performed by the following measurement methods and measurement conditions unless otherwise specified.
- LC-Module-1 manufactured by Nippon Waters-Limited was used as a detector.
- DIC-370 manufactured by JASCO Corporation was used.
- Amino acid analysis was performed by hydrolyzing the obtained peptide in 6 N hydrochloric acid (containing 0.1% phenol) at 110 ° C for 20 hours, and then using a Hitachi amino acid analyzer L-8500 (manufactured by Hitachi). I went.
- the deprotected H-Arg (Tos) -Pro-NHE or TFA was dissolved in a mixed solvent of 80 mL of DMF and 200 mL of THF, and neutralized with N-methylmorpholine while cooling. Next, a solution prepared by dissolving 53.06 g of Z-Leu-OH and 23.02 g of HOSu in 200 mL of THF and 36.4 mL of WSC were added, and the mixture was stirred at 0 ° C for 5 minutes and at room temperature overnight. After confirmation with ninhydrin, the reaction mixture was concentrated under reduced pressure.
- the Z-Ser-Tyr-OMe 38.Og produced in the above (1-4) was dissolved in 200 mL of methanol, 50 g of hydrazine was added, and the mixture was allowed to stand at room temperature overnight. Thereafter, the mixture was concentrated under reduced pressure and washed with methanol. Thus, 34.2 g (yield 90.0%) of Z-Ser-Tyr-MNH 2 was obtained.
- the powder obtained from the organic layer was dissolved in a 0.01 M aqueous ammonium acetate solution and applied to a column (4 ⁇ 30 cm) filled with CM-cellulose.
- a linear concentration gradient elution (60 mL / hour) of 500 mL of 0.01 M aqueous ammonium acetate solution (PH4.4) to 500 mL of 0.1 M aqueous ammonium acetate solution (pH 4.4) was performed, and 10 mL of the eluate was fractionated and collected.
- the eluate was analyzed by high performance liquid chromatography, and the target fraction was collected and freeze-dried. In this way, 22.4 g of pGlu-His-Trp-Ser-Tyr-D-Ser (But) -Leu-Arg-Pro-NHEt was obtained (yield: 74.9%).
- the filtrate was concentrated and applied to a column (4 x 30 cm) packed with CM-cellulose.
- a linear concentration gradient elution (60 / hour) of 500 mL of 0.01 M aqueous ammonium acetate solution (pH 4.4) to 500 mL of 0.1 M aqueous ammonium acetate solution (PH4.4) was performed, and the elution was fractionated and collected in 10 mL portions. .
- the eluate was analyzed by HPLC, and the desired fraction was collected and lyophilized.
- 1.45 g of pGlu-His-Trp-Ser-Tyr-D-Ser (But) -Leu-Arg-Pro-NHEt was obtained (yield: 82.4%).
- the melting point, optical rotation, Tf Rf value and elemental analysis value of the obtained compound were as follows: pG 1 uHis-Trp-Ser-Ty rD-Se r prepared in Example 1 (1-11). (Bu t) -Leu-Arg-Pro- NHEt.
- the reaction was carried out using the peptides shown in Table 1 as substrates under the conditions of the above enzyme reaction, and the peptides produced 2 hours after the start of the reaction were analyzed by HPLC, and the yield was calculated from the area of each peak.
- the yield was 0%, indicating that the reaction did not proceed at all.
- the yield was as low as 7.8%, but it was confirmed that there was a product. The yield is 0% and the reaction does not proceed even when a substrate in which the enzyme binding site Ser is D-form is used.
- ZD-Ser (But) -Leu-Arg-Pro-NHEt produced according to (1-1) to (1-3) of Example 1 was replaced with the following (2-1) to (2- PGlu-His-Trp-Ser-Tyr-D-Ser (But) -Leu-Arg-Pro-NHEt was produced in the same manner as in Example 1 except that it was produced according to 3).
- Z-Leu-Arg-OEt was dissolved in 500 mL of methanol, 150 mL of thigh was added under ice cooling, and the mixture was stirred at room temperature for 18 hours.
- the reaction solution was concentrated under reduced pressure, and the obtained residue was weighed with 500 mL of water, and extracted five times with 1,00 mL of n-butanol. The extract was washed four times with 500 mL of water and concentrated under reduced pressure.
- the obtained residue was solidified by treating with a ether and dried. In this way, Z- Leu- Arg- NHNH 2 209.7g ( 74.1% yield).
- H-Leu-Arg (Tos) -Pro-NHEt was dissolved in 80 mL DMF and 200 mL THF. The solution was neutralized with N-methylmorpholine while cooling. Next, to this solution was added a solution of 8.86 g of Boc-D-Leu-OH and 23.02 g of HOSu dissolved in 200 mL of THF, and 36.4 mL of WSC, and the mixture was stirred at 0 ° C for 5 minutes and at room temperature overnight. did. After confirmation with ninhydrin, the reaction mixture was concentrated under reduced pressure. To the residue was added 500 mL of water, and extracted five times with 200 mL of n-butanol.
- H-Ser-Tyr-D-Ser (But) -Leu-Arg-Pro-NHEt
- H-Ser-Tyr-D-Leu-Leu-Arg-Pro-NHEt prepared in (3-3) above Except that 1.30 g was used, 1.33 g of Glu-His-Trp-Ser-Tyr-D-Leu-Leu-Arg-Pro-HEt was obtained in the same manner as (1-11) in Example 1 (yield 76.4%).
- optical rotation, elemental analysis value and amino acid analysis value of pGlu-His-Trp-Ser-Tyr-D-Leu-Leu-Arg-Pro-NHEt are shown below.
- the Boc-Arg (N0 2) -0H 13.5g was dissolved in THF lOOmL, dry ice - cooled to -20 ° C with ethanol. To this, 3.3 mL of N-methylmorpholine was added dropwise, followed by 3.96 mL of isobutylchloroformate, and the mixture was stirred at -20 ° C for 1 minute to produce the corresponding mixed acid anhydride.
- the obtained reaction solution was mixed with 200 mL of a DMF solution of H-Pro-Azgly-NH 2 ⁇ TFA (neutralized with N-methylmorpholine), and the mixture was stirred at 0 ° C for 5 minutes. After stirring at room temperature for 30 minutes, the mixture was concentrated under reduced pressure.
- Boc-Arg (N0 2) the melting point of the Pro-Azgly-NH 2, optical rotation, shown below Symbol of Rf and elemental analysis values of TLC.
- the H-Arg (N0 2) -Pro -NHEt 'TFA was dissolved in a mixed solvent of DMF 80 mL and THF 200 mL. The solution was neutralized with N-methylmorpholine while cooling. Next, to this solution was added a solution of 53.06 g (0.2 mole) of Z-Leu-OH and 23.02 g (0.22 mole) of HOSu dissolved in 200 mL of THF, and 36.4 mL (0.2 mol 1 e) of WSC, and added 0 ° C. The mixture was stirred at room temperature for 5 minutes at room temperature. After confirmation with ninhydrin, the reaction mixture was concentrated under reduced pressure.
- H-Ser-Tyr-D-Ser (But) -Leu-Arg-Pro-NHEt
- H-Ser-Tyr-D-Ser (But) -Leu-Arg- produced in (4-6) above Except that 1.30 g of Pro-Azgly-NH 2 was used, pGlu-His-Trp-Ser-Tyr-D-Ser (But) -Leu-Arg- 1.29 g (yield 75.9%) of Pro-Azgly-NH 2 was obtained.
- Solid phase synthesis was performed using a peptide synthesizer 9600 manufactured by Milligen Biosciences as a solid phase synthesizer.
- MBHA p-methylbenzhydrylamine
- Boc-Gly-MBHA resin was washed with 8 mL of DCM (4 times, 1 minute each) and filtered.
- the pGiu- Hi s-Trp- Ser- Tyr- D- Trp- Leu- Arg- Pro- amino acid sequence of Gly-NH 2 2 mmole of Boc-Pro-OH corresponding to the ninth amino acid residue was dissolved in 4 mL of DCM, and 1.5 mL of DCC (0.5M-DCM solution) was added in the amino acid activation vessel and reacted for 7 minutes. Thereafter, the reaction mixture was filtered and transferred to a concentration vessel, to which 3 mL of DMF was added, and DCM was distilled off under a stream of argon gas.
- Boc-Ser (Bzl) -0H 2 In the above solid-phase synthesis, double coupling was performed when Arg was used. Thus, 2.76 g of the protected peptide-MBHA resin, Boc-Se r (Bz 1) -Tyr (Bz 1) -D-Trp-Leu-Arg (Tos) -Pro-G 1 y-MBHA resin was obtained. .
- H-Ser-Tyr-D-Ser (But) -Leu-Arg-Pro-NHEt
- H-Ser-Tyr-D-Trp-Leu-Arg-Pro-Gly produced in (5-1) above except for using the -NH 2 1.30 g the of example 1 (Bok 11) by the same method as Li
- pGlu-His-Trp-Ser -Tyr-D-Trp-Leu-Arg-Pro-Gly-NH 2 1.26 g (75.45% yield) were obtained.
- Example 5 (5-1) except that Boc-D- (2-naphthyl) -D-Ala-0H was used instead of Boc-D-Trp-0H corresponding to the sixth amino acid residue.
- H-Ser-Tyr-D-Ser (But) -Leu-Arg-Pro-NHEt
- H-Ser-Tyr-G 1 y-Leu-Arg-Pro-G produced in (6-1) above 1 y-NH 2 (SEQ ID NO: 4) pG 1 uHis-Trp-Ser-Ty rG 1 y-Leu-Arg- by the same method as in Example 1, except that 1.12 g was used. 1.16 g (76.3% yield) of Pro-Gly-NH 2 (SEQ ID NO: 1) was obtained.
- amino acid number 2 Xaa is Arg (N0 2), the Xaa of the amino acid number 4 Azgly
- Xaa represents Azgly- NH 2.
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Description
Claims
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15264396A JP3249915B2 (ja) | 1996-06-13 | 1996-06-13 | Lh−rh誘導体の製造方法 |
| EP97933897A EP1008656A4 (en) | 1996-06-13 | 1997-08-04 | METHOD FOR PRODUCING LH-RH DERIVATIVES |
| CA002299267A CA2299267A1 (en) | 1997-08-04 | 1997-08-04 | Process for producing lh-rh derivatives |
| AU37086/97A AU3708697A (en) | 1997-08-04 | 1997-08-04 | Process for producing lh-rh derivatives |
| PCT/JP1997/002705 WO1999007874A1 (en) | 1996-06-13 | 1997-08-04 | Process for producing lh-rh derivatives |
| KR1020007001226A KR20010022632A (ko) | 1997-08-04 | 1997-08-04 | Lh-rh 유도체의 제조방법 |
| US09/463,947 US6448031B1 (en) | 1996-06-13 | 1997-08-04 | Process for producing LH-RH derivatives |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15264396A JP3249915B2 (ja) | 1996-06-13 | 1996-06-13 | Lh−rh誘導体の製造方法 |
| PCT/JP1997/002705 WO1999007874A1 (en) | 1996-06-13 | 1997-08-04 | Process for producing lh-rh derivatives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999007874A1 true WO1999007874A1 (en) | 1999-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1997/002705 Ceased WO1999007874A1 (en) | 1996-06-13 | 1997-08-04 | Process for producing lh-rh derivatives |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6448031B1 (ja) |
| EP (1) | EP1008656A4 (ja) |
| WO (1) | WO1999007874A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2119724A1 (en) | 2005-05-03 | 2009-11-18 | Novetide Ltd. | Solid-phase process foor the preparation of goserelin |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006133353A2 (en) * | 2005-06-08 | 2006-12-14 | The University Of North Carolina At Chapel Hill | Methods of facilitating neural cell survival using non-peptide and peptide bdnf neurotrophin mimetics |
| CN101759777B (zh) * | 2010-01-05 | 2013-06-05 | 江苏诺泰制药有限公司 | 一种戈舍瑞林的合成方法 |
| RU2444525C2 (ru) * | 2010-06-09 | 2012-03-10 | Закрытое Акционерное Общество "Фарм-Синтез" | Способ получения нонапептидэтиламида и промежуточные соединения для его получения |
| RU2015141934A (ru) | 2013-03-15 | 2017-04-20 | Фарматрофикс, Инк. | Непептидные миметики нейротрофина bdnf |
| JP2016519668A (ja) | 2013-03-15 | 2016-07-07 | ファーマトロフィックス, インコーポレイテッド | 非ペプチドbdnfニューロトロフィン模倣化合物 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4234571A (en) * | 1979-06-11 | 1980-11-18 | Syntex (U.S.A.) Inc. | Nonapeptide and decapeptide derivatives of luteinizing hormone releasing hormone |
| JPS6113480B2 (ja) * | 1976-05-11 | 1986-04-14 | Ici Plc |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE43738T1 (de) | 1984-06-26 | 1989-06-15 | Siemens Ag | Positioniereinrichtung fuer einen magnetplattenspeicher. |
| US5002872A (en) * | 1989-05-10 | 1991-03-26 | W. R. Grace & Co.-Conn. | Enzyme mediated coupling reactions |
-
1997
- 1997-08-04 US US09/463,947 patent/US6448031B1/en not_active Expired - Fee Related
- 1997-08-04 WO PCT/JP1997/002705 patent/WO1999007874A1/ja not_active Ceased
- 1997-08-04 EP EP97933897A patent/EP1008656A4/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6113480B2 (ja) * | 1976-05-11 | 1986-04-14 | Ici Plc | |
| US4234571A (en) * | 1979-06-11 | 1980-11-18 | Syntex (U.S.A.) Inc. | Nonapeptide and decapeptide derivatives of luteinizing hormone releasing hormone |
Non-Patent Citations (4)
| Title |
|---|
| D.A. LOVEJOY et al., "Primary Structure of Two Forms of Gonadotropin-Releasing Hormone from Brains of the American Alligator(Alligator Mississippiensis)", REGULATORY PEPTIDES, (1991), 33, p. 105-116. * |
| M. SCHUSTER et al., "Alpha-Chymotrypsin-Catalyzed (3+7) Segment Synthesis of the Luteinizing Hormone Releasing Hormone", TETRAHEDRON LETTERS, (1992), Vol. 33, No. 20, p. 2799-2802. * |
| NANCY SHERWOOD et al., "Characterization of a Teleost Gonadotropin-Releasing Hormone", PROC. NATL. ACAD. SCI. USA, (1983), Vol. 80, p. 2794-2798. * |
| See also references of EP1008656A4 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2119724A1 (en) | 2005-05-03 | 2009-11-18 | Novetide Ltd. | Solid-phase process foor the preparation of goserelin |
| EP2119725A1 (en) | 2005-05-03 | 2009-11-18 | Novetide Ltd. | Methods for the production of leuprolide |
Also Published As
| Publication number | Publication date |
|---|---|
| US6448031B1 (en) | 2002-09-10 |
| EP1008656A4 (en) | 2000-09-20 |
| EP1008656A1 (en) | 2000-06-14 |
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