[EN] A PROCESS FOR THE PREPARATION OF VERAPAMIL HYDROCHLORIDE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE CHLORHYDRATE DE VÉRAPAMIL
申请人:PIRAMAL ENTPR LTD
公开号:WO2016181292A1
公开(公告)日:2016-11-17
The present invention relates to a process for the preparation of 5-(3,4-dimethoxyphenylethyl) methyl-amino-2-(3,4-dimethoxyphenyl)-2-isopropyl valeronitrile, which is known as Verapamil. The present invention also relates to a process for improving the purity of verapamil and therefore of its hydrochloride represented as the compound of formula I, by efficient removal of the impurities formed, affording a product of purity greater than 99 %. The process of the present invention is simple, efficient, cost-effective and industrially feasible.
本发明涉及一种制备5-(3,4-二甲氧基苯乙基)甲基氨基-2-(3,4-二甲氧基苯基)-2-异丙基戊腈的方法,该化合物被称为维拉帕米。本发明还涉及一种提高维拉帕米及其盐酸盐(化学式I)纯度的方法,通过有效去除形成的杂质,得到纯度大于99%的产品。本发明的方法简单、高效、具有成本效益和工业可行性。