Method for the preparation of clopidogrel and its analogues of methyl-tetrahydrothieno[3,2-C]pyridine acetate
申请人:Zhejiang Hauhai Pharmaceutical Co., Ltd.
公开号:US07932391B2
公开(公告)日:2011-04-26
The present invention disclosed a preparation method of Clopidogrel (X=2−Cl) and its analogues of methyl tetrahydrothienopyridine acetate (I) by using halogen phenyl acetonitrile (VIII) as starting material and tetrahydrothienopyridine acetonitrile (IV), tetrahydrothienopyridine acetate (V) as key intermediates, and further using kinetic resolution to prepare the optical active Clopidogrel and compounds of methyl tetrahydrothenopridine acetate of formula (XII). The Clopidogrel of present invention is a novel high effective and safety drug for inhibition of platelet aggregation. This invention applied systematic technique of racemization of unwanted optical active enantiomer, recover recycle and reuse of resolution agent etc., with greater economic advantages and suitable for commercial scale industrial production.
Wherein: X represents atoms of hydrogen, fluorine, chlorine, bromine or iodine, M represents an alkali metal ion.
本发明公开了一种使用卤代苯乙腈(VIII)为起始物质,四氢噻吩吡啶乙腈(IV)、四氢噻吩吡啶醋酸酯(V)为关键中间体,并进一步使用动力学分辨法制备光学活性的Clopidogrel和式(XII)的甲基四氢噻吩吡啶醋酸酯类似物的制备方法。本发明的Clopidogrel是一种新型高效、安全的抑制血小板聚集的药物。本发明应用了不需要的光学活性对映体的外消旋技术、分辨剂的回收再利用等系统技术,具有更大的经济优势,适用于商业规模的工业生产。其中:X代表氢、氟、氯、溴或碘原子,M代表碱金属离子。