The present invention relates to a process for the preparation of S-(+)-clopidogrel by an optical resolution and, more particularly, to a process for the preparation of S-(+)-clopidogrel represented by the following formula 1 with high optical purity by converting a clopidogrel racemic carboxylic acid into a diastereomeric salt using a (+)-cinchonine for optical resolution, extracting an S-(+)-clopidogrel carboxylic acid from the diastereomeric salt using a suitable solvent under an acidic condition and then reacting the S-(+)-clopidogrel carboxylic acid with methanol.
本发明涉及一种通过光学分辨法制备S-(+)-
氯吡格雷的方法,更具体地说,涉及一种将
氯吡格雷外消旋
羧酸转化为对映异构盐,使用(+)-
奎宁进行光学分辨,使用适当的溶剂在酸性条件下从对映异构盐中提取S-(+)-
氯吡格雷羧酸,然后将S-(+)-
氯吡格雷羧酸与
甲醇反应,制备高光学纯度的S-(+)-
氯吡格雷的方法。该S-(+)-
氯吡格雷的
化学式如下:式1。