The process for the preparation of pramipexole base and/or its pharmaceutically acceptable salts, especially the hydrochloride salt, in the alkylation reaction of (S)-(−)2,6-diamino-4,5,6,7-tetrahydrobenzothiazole with an alkylating agent, wherein the reaction is carried out in the absence of a base, and in a solvent from which the resulting N-monoalkylated product selectively precipitates out as a salt. After isolation from the reaction mixture, the N-monoalkylated product is converted a) into the free pramipexole base upon treatment with an inorganic base and is then converted into another pharmaceutically acceptable pramipexole salt; or b) directly into another pharmaceutically acceptable pramipexole salt or the hydrate thereof.
制备普拉米贝克索(pramipexole)基础物质和/或其药学上可接受的盐(尤其是盐酸盐)的过程中,采用(S)-(-)2,6-二
氨基-4,5,6,7-四氢
苯并噻唑与烷基化剂的烷基化反应,其中反应在无碱的情况下,在一种溶剂中进行,从中选择性地沉淀出N-单烷基化产物的盐。在从反应混合物中分离后,N-单烷基化产物被转化为a)使用
无机碱处理后的自由普拉米贝克索基础物质,然后转化为另一种药学上可接受的普拉米贝克索盐;或b)直接转化为另一种药学上可接受的普拉米贝克索盐或其
水合物。