Method preparation clopidogrel and intermediates used therein
US7763730B2 · kind B2 · utility
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Key dates
| Filing date | Aug 28, 2009 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Aug 28, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P9/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Optically pure clopidogrel can be prepared in a high yield by optically resolving a racemic form of the compound of formula (II) using an optically active amine to form the optically active form of the compound of formula (III) or its acid-addition salt; and methylating the compound of formula (III) or its acid-addition salt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.