http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-200503688-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c440bf3f89f1db04a8e1115f893f8e7c |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-582 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D495-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D495-04 |
| filingDate | 2004-04-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_50c342f00313b82892627c7e41c665db |
| publicationDate | 2005-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | TW-200503688-A |
| titleOfInvention | Preparation of (s)-clopidogrel and related compounds |
| abstract | A process for producing enantiomerically enriched (S)-a -(2-chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine-5 (4H)-acetic acid hydrocarbyl ester, represented by the formula: Is provided, wherein R1 and R2 are hydrogens and R3 is methyl (i.e., (S)-Clopidogrel). The process includes the steps of: (a) contacting N-2-chlorobenz-aldehyde-ylidene-1-ethylamine-2 (2-thiophenyl)imine and an HCN source, in the presence of a non-metallic asymmetric Strecker catalyst to form enantiomerically enriched (S)-α,α-(2-thiophenylethylamino) (2-chlorophenyl) acetonitrile; (b) contacting the enantiomerically enriched (S)-α,α-(2-thiophenylethylamino) (2-chlorophenyl) acetonitrile and a formaldehyde equivalent, in the presence of an acid catalyst to form enantiomerically enriched a-5(4,5,6,7-tetrahydro[3,2-c] thienopyridyl) (2-chlorobenzyl)-nitrile; and (c) contacting the enantiomerically enriched α-5(4,5,6,7-tetrahydro[3,2-c] thienopyridyl) (2-chlorobenzyl)-nitrile and a reagent capable of converting a cyano group into an ester group to form enantiomerically enriched hydrocarbyl ester of (S)-α-(2-chlorophenyl)-6,7-dihydrothieno-[3,2-c]pyridine-5(4H)-acetic acid. |
| priorityDate | 2003-04-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 27.