PREPARATION OF CLOPIDOGREL AND ITS ANALOGUES METHYL TETRAHYDROTHIENOPYRIDINE ACETATE COMPOUNDS
申请人:Zhejiang Huahai Pharmaceutical Co., Ltd.
公开号:EP1942110A1
公开(公告)日:2008-07-09
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.
本发明公开了一种以卤代苯乙腈(VIII)为起始原料,以四氢噻吩吡啶乙腈(IV)、四氢噻吩吡啶乙酸酯(V)为关键中间体,进一步利用动力学解析法制备出光学活性氯吡格雷和式(XII)的四氢塞那吡啶乙酸甲酯化合物。本发明的氯吡格雷是一种新型高效安全的抑制血小板聚集的药物。本发明采用系统的技术,对不需要的光学活性对映体进行消旋化,回收循环再利用解析剂等,具有较大的经济优势,适合商业化规模的工业生产。
其中X 代表氢原子、氟原子、氯原子、溴原子或碘原子,M 代表碱金属离子。