EP0986538A1 - Verfahren zur herstellung von chiralen 3,4-dehydroprolinen - Google Patents
Verfahren zur herstellung von chiralen 3,4-dehydroprolinenInfo
- Publication number
- EP0986538A1 EP0986538A1 EP98933585A EP98933585A EP0986538A1 EP 0986538 A1 EP0986538 A1 EP 0986538A1 EP 98933585 A EP98933585 A EP 98933585A EP 98933585 A EP98933585 A EP 98933585A EP 0986538 A1 EP0986538 A1 EP 0986538A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chiral
- formula
- reaction
- dehydroprolines
- ammonia
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 10
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims abstract description 8
- WRHZVMBBRYBTKZ-UHFFFAOYSA-N pyrrole-2-carboxylic acid Chemical class OC(=O)C1=CC=CN1 WRHZVMBBRYBTKZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 150000001875 compounds Chemical class 0.000 claims abstract description 5
- 239000003513 alkali Substances 0.000 claims abstract description 4
- 150000001342 alkaline earth metals Chemical class 0.000 claims abstract description 4
- 239000012266 salt solution Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 125000006239 protecting group Chemical group 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 125000003342 alkenyl group Chemical group 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- 239000012442 inert solvent Substances 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims 1
- 238000003786 synthesis reaction Methods 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical class [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- NRUKTXCMKFFMBR-UHFFFAOYSA-N 1-[(2-methylpropan-2-yl)oxycarbonyl]pyrrole-2-carboxylic acid Chemical compound CC(C)(C)OC(=O)N1C=CC=C1C(O)=O NRUKTXCMKFFMBR-UHFFFAOYSA-N 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 238000006027 Birch reduction reaction Methods 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 4
- 238000005481 NMR spectroscopy Methods 0.000 description 3
- 230000002255 enzymatic effect Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 2
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- PMMYEEVYMWASQN-UHFFFAOYSA-N dl-hydroxyproline Natural products OC1C[NH2+]C(C([O-])=O)C1 PMMYEEVYMWASQN-UHFFFAOYSA-N 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 229960002591 hydroxyproline Drugs 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- 239000012074 organic phase Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 150000003233 pyrroles Chemical class 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- MXFLKCJYHWCBBK-LURJTMIESA-N (2S)-2-methoxy-2-methylpyrrolidine Chemical compound C[C@@]1(CCCN1)OC MXFLKCJYHWCBBK-LURJTMIESA-N 0.000 description 1
- 238000005160 1H NMR spectroscopy Methods 0.000 description 1
- SMNDYUVBFMFKNZ-UHFFFAOYSA-N 2-furoic acid Chemical class OC(=O)C1=CC=CO1 SMNDYUVBFMFKNZ-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- HBAQYPYDRFILMT-UHFFFAOYSA-N 8-[3-(1-cyclopropylpyrazol-4-yl)-1H-pyrazolo[4,3-d]pyrimidin-5-yl]-3-methyl-3,8-diazabicyclo[3.2.1]octan-2-one Chemical class C1(CC1)N1N=CC(=C1)C1=NNC2=C1N=C(N=C2)N1C2C(N(CC1CC2)C)=O HBAQYPYDRFILMT-UHFFFAOYSA-N 0.000 description 1
- UPRTVAZTIXVDSK-ZCMDIHMWSA-N CC(C)(C)OC(N1C(C(O)=O)=CC=C1)=O.COC[C@H]1NCCC1 Chemical compound CC(C)(C)OC(N1C(C(O)=O)=CC=C1)=O.COC[C@H]1NCCC1 UPRTVAZTIXVDSK-ZCMDIHMWSA-N 0.000 description 1
- DCERHCFNWRGHLK-UHFFFAOYSA-N C[Si](C)C Chemical compound C[Si](C)C DCERHCFNWRGHLK-UHFFFAOYSA-N 0.000 description 1
- IAZDPXIOMUYVGZ-WFGJKAKNSA-N Dimethyl sulfoxide Chemical compound [2H]C([2H])([2H])S(=O)C([2H])([2H])[2H] IAZDPXIOMUYVGZ-WFGJKAKNSA-N 0.000 description 1
- 101150096839 Fcmr gene Proteins 0.000 description 1
- PMMYEEVYMWASQN-DMTCNVIQSA-N Hydroxyproline Chemical compound O[C@H]1CN[C@H](C(O)=O)C1 PMMYEEVYMWASQN-DMTCNVIQSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- ONIBWKKTOPOVIA-UHFFFAOYSA-N Proline Natural products OC(=O)C1CCCN1 ONIBWKKTOPOVIA-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 229940122388 Thrombin inhibitor Drugs 0.000 description 1
- 230000002152 alkylating effect Effects 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 150000001558 benzoic acid derivatives Chemical class 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000007806 chemical reaction intermediate Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 229910000043 hydrogen iodide Inorganic materials 0.000 description 1
- -1 hydroxyproline ester Chemical class 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 150000004694 iodide salts Chemical class 0.000 description 1
- INQOMBQAUSQDDS-UHFFFAOYSA-N iodomethane Chemical compound IC INQOMBQAUSQDDS-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 125000004170 methylsulfonyl group Chemical group [H]C([H])([H])S(*)(=O)=O 0.000 description 1
- 125000003170 phenylsulfonyl group Chemical group C1(=CC=CC=C1)S(=O)(=O)* 0.000 description 1
- LSMAIBOZUPTNBR-UHFFFAOYSA-N phosphanium;iodide Chemical compound [PH4+].[I-] LSMAIBOZUPTNBR-UHFFFAOYSA-N 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000011814 protection agent Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- ZIJTYIRGFVHPHZ-UHFFFAOYSA-N selenium oxide(seo) Chemical class [Se]=O ZIJTYIRGFVHPHZ-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 150000003459 sulfonic acid esters Chemical class 0.000 description 1
- 150000003462 sulfoxides Chemical class 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 238000001149 thermolysis Methods 0.000 description 1
- 239000003868 thrombin inhibitor Substances 0.000 description 1
- 125000002088 tosyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1C([H])([H])[H])S(*)(=O)=O 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- FGMPLJWBKKVCDB-UHFFFAOYSA-N trans-L-hydroxy-proline Natural products ON1CCCC1C(O)=O FGMPLJWBKKVCDB-UHFFFAOYSA-N 0.000 description 1
- ITMCEJHCFYSIIV-UHFFFAOYSA-M triflate Chemical compound [O-]S(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-M 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
- C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
- C07D417/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings linked by a chain containing hetero atoms as chain links
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D207/18—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member
- C07D207/20—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D207/18—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member
- C07D207/22—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
Definitions
- the present invention relates to a process for the preparation of chiral 3, 4-dehydroprolines.
- Achiral syntheses usually start from pyrrolecarboxylic acid, which is reduced with phosphonium iodide / hydrogen iodide (J.W. Scott, Synth. Commun. 10 (1980) 529). The racemate is then separated by means of crystallization with chiral amines (S.S. Kerwar, J. Biol. Chem. 251 (1976) 503; US 4,066,658) or tartaric acid (A. Corbella, Chem. Ind. (1969) 583). The disadvantage of this synthesis is the handling of the highly toxic phosphine and a maximum yield of 50% in the resolution of racemates.
- the invention relates to a process for the preparation of chiral 3, 4-dehydroprolines of the formula I.
- R is a chiral auxiliary group
- R ' is hydrogen or a Ci-e-alkyl, C 2 - 7 alkenyl, C 7 -g-arylalkyl or tri-C ⁇ _ -alkylsilylrest and
- R '' mean a protective group, which consists in that a pyrrole carboxylic acid derivative of the formula II
- Non-aromatic chiral secondary amines and non-aromatic chiral alcohols of the formula RH are particularly suitable as sources for the chiral auxiliary groups R. As such, be special
- the compound D is particularly preferred.
- R ' is preferably hydrogen, C 3 alkyl, allyl or benzyl.
- the trimethylsilyl radical should be mentioned in particular as the tri-4-alkylsilyl radical.
- Protective groups for R ′′ include Boc, C ⁇ _ 6 -acyl, mesyl, benzenesulfonyl and tosyl and preferably Boc.
- Preferred leaving groups for X are Cl, Br, I, MesO, TosO or Trif lat.
- Magnesium and in particular lithium, sodium and potassium are mentioned as alkali or alkaline earth metals for the reaction.
- the reaction takes place in liquid or supercritical ammonia, to which an inert solvent can optionally be added.
- Preferred solvents are THF and Ci- 6 alcohols.
- the reaction is generally carried out in the temperature range from -100 to +100 ° C and a pressure range from 1 to 200 bar.
- the boiling point temperature of the reaction mixture and 1 bar is preferred.
- the reaction under self-pressure is very particularly preferred.
- the reaction is complete when pyrrole derivatives can no longer be detected in the reaction mixture (for example by means of GC, HPLC, DC).
- the processing of the process product is generally carried out using conventional processes, such as distillation, filtration, centrifugation or extraction.
- the process according to the invention can be carried out batchwise, e.g. be carried out in a stirred reactor.
- the simple feasibility offers the advantage that the reaction can also be carried out continuously, for example using a reaction tube or a stirred reactor cascade.
- the raw products obtained can, if desired, be further purified, e.g. by crystallization, extraction or chromatography.
- chiral 3, 4-dehydroprolines of the formula I which can be prepared in a simple manner by the process according to the invention are valuable intermediates for the synthesis of dyes, crop protection agents or medicaments, in particular thrombin inhibitors, such as e.g. described in PCT / WO 9625426.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pyrrole Compounds (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Plural Heterocyclic Compounds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19723473 | 1997-06-04 | ||
| DE19723473A DE19723473A1 (de) | 1997-06-04 | 1997-06-04 | Verfahren zur Herstellung von chiralen 3,4-Didehydroprolinen |
| PCT/EP1998/003284 WO1998055456A1 (de) | 1997-06-04 | 1998-06-02 | Verfahren zur herstellung von chiralen 3,4-dehydroprolinen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0986538A1 true EP0986538A1 (de) | 2000-03-22 |
Family
ID=7831406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98933585A Withdrawn EP0986538A1 (de) | 1997-06-04 | 1998-06-02 | Verfahren zur herstellung von chiralen 3,4-dehydroprolinen |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US6166222A (de) |
| EP (1) | EP0986538A1 (de) |
| JP (1) | JP2002506430A (de) |
| KR (1) | KR20010013342A (de) |
| CN (1) | CN1259122A (de) |
| AU (1) | AU8335298A (de) |
| BR (1) | BR9809726A (de) |
| CA (1) | CA2291787A1 (de) |
| DE (1) | DE19723473A1 (de) |
| HU (1) | HUP0002772A3 (de) |
| IL (1) | IL132988A0 (de) |
| NO (1) | NO995939L (de) |
| WO (1) | WO1998055456A1 (de) |
| ZA (1) | ZA984814B (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19913699A1 (de) * | 1999-03-26 | 2000-09-28 | Basf Ag | Verfahren zur Herstellung von 3,4-Dihydroprolinen und 3,4-Dehydropiperidinen |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19630082A1 (de) * | 1996-07-26 | 1998-01-29 | Basf Ag | Verfahren zur Herstellung von 3-Pyrrolin-2-carbonsäure-Derivaten |
-
1997
- 1997-06-04 DE DE19723473A patent/DE19723473A1/de not_active Withdrawn
-
1998
- 1998-06-02 AU AU83352/98A patent/AU8335298A/en not_active Abandoned
- 1998-06-02 WO PCT/EP1998/003284 patent/WO1998055456A1/de not_active Ceased
- 1998-06-02 JP JP50148499A patent/JP2002506430A/ja active Pending
- 1998-06-02 EP EP98933585A patent/EP0986538A1/de not_active Withdrawn
- 1998-06-02 CA CA002291787A patent/CA2291787A1/en not_active Abandoned
- 1998-06-02 IL IL13298898A patent/IL132988A0/xx unknown
- 1998-06-02 KR KR19997011338A patent/KR20010013342A/ko not_active Withdrawn
- 1998-06-02 US US09/424,933 patent/US6166222A/en not_active Expired - Fee Related
- 1998-06-02 BR BR9809726-1A patent/BR9809726A/pt not_active IP Right Cessation
- 1998-06-02 HU HU0002772A patent/HUP0002772A3/hu unknown
- 1998-06-02 CN CN98805882A patent/CN1259122A/zh active Pending
- 1998-06-04 ZA ZA9804814A patent/ZA984814B/xx unknown
-
1999
- 1999-12-03 NO NO995939A patent/NO995939L/no not_active Application Discontinuation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9855456A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU8335298A (en) | 1998-12-21 |
| CN1259122A (zh) | 2000-07-05 |
| ZA984814B (en) | 1999-12-17 |
| HUP0002772A3 (en) | 2001-02-28 |
| NO995939D0 (no) | 1999-12-03 |
| IL132988A0 (en) | 2001-03-19 |
| KR20010013342A (ko) | 2001-02-26 |
| WO1998055456A1 (de) | 1998-12-10 |
| NO995939L (no) | 1999-12-03 |
| BR9809726A (pt) | 2000-07-11 |
| DE19723473A1 (de) | 1998-12-10 |
| MX9910984A (de) | 2000-04-01 |
| HUP0002772A2 (hu) | 2000-12-28 |
| JP2002506430A (ja) | 2002-02-26 |
| US6166222A (en) | 2000-12-26 |
| CA2291787A1 (en) | 1998-12-10 |
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