C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 495/04 (2006.01)
Patent
CA 2567806
The present invention discloses a rapid resolution process of racemic clopidogrel base followed by conversion of the resolved (S) isomer to crystalline Clopidogrel bisulfate Form I. The invention also discloses novel racemization process of the unwanted (R) isomer of clopidogrel base. The invention further discloses an improved process for preparation of acid addition salts of clopidogrel.
L'invention concerne un procédé de résolution rapide de base clopidogrel racémique suivi par la conversion de l'isomère résolu (S) en la forme I cristalline de l'hydrogénosulfate de clopidogrel. L'invention concerne également un procédé de racémisation de l'isomère non souhaité (R) de la base de clopidogrel. L'invention concerne également un procédé amélioré de préparation de sels d'addition acides de clopidogrel.
Deshpande Manoj Madhukarrao
Mondkar Harish Kashinath
Naik Tushar Anil
Sathe Dhananjay Govind
Sawant Kamlesh Digambar
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Usv Limited
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