Method of Preparing Clopidogrel and Intermediates Used Therein
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.
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Page/Page column 4
(2008/12/08)
METHOD OF PREPARING CLOPIDOGREL AND INTERMEDIATES USED THEREIN
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.
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Page/Page column 10-11
(2010/11/25)
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