The present invention provides a process for the preparation of clopidogrel and its pharmaceutically acceptable salts thereof comprises the resolving racemic methyl alpha-5-(4,5,6,7-tetrahydro[3,2-c]thienopyridyl)(2-chlorophenyl)-acetate by the salt formation of methyl alpha-5-(4,5,6,7-tetrahydro[3,2-c]thienopyridyl)(2-chlorophenyl)-acetate with excess levorotatory camphor-10-sulfonic acid to get a maximum yield of camphor sulphonate salt of methyl S-(+)-alpha-5-(4,5,6,7-tetrahydro[3,2-e]thienopyridyl)(2-chlorophenyl)-acetate and transforming the camphor sulphonate salt to clopidogrel or its pharmaceutically acceptable salts thereof.
本发明提供了一种制备
氯吡格雷及其药用可接受盐的方法,包括通过盐形成使
氯吡格雷的外消旋甲基α-5-(4,5,6,7-四氢[3,2-c]噻
吡啶基)(2-
氯苯基)-
乙酸酯与过量
左旋樟脑-10-
磺酸反应,以获得最大产量的
樟脑磺酸盐的甲基S-(+)-α-5-(4,5,6,7-四氢[3,2-e]噻
吡啶基)(2-
氯苯基)-
乙酸酯,然后将
樟脑磺酸盐转化为
氯吡格雷或其药用可接受盐。