[EN] A METHOD OF PREPARATION OF DESVENLAFAXINE AND ITS SALTS<br/>[FR] MÉTHODE DE SYNTHÈSE DE DESVENLAFAXINE ET DE SES SELS
申请人:ZENTIVA KS
公开号:WO2010060390A1
公开(公告)日:2010-06-03
A method of preparation of 4-(2-(dimethylamino)-1-(1-hydroxycyclohexyl)ethyl)phenol of formula (I), known under the generic name desvenlafaxine, and its pharmaceutically acceptable salts, which comprises (a) stirring up O-benzyl desvenlafaxine or its derivative of formula (II), or its salt, where R is selected from H, 4-methyl, 4-methoxy, 3,4-dimethoxy, 2-nitro, 4-nitro, 4-chloro, 4-bromo, 2,6-dichloro and 2,6-difluoro, in an organic solvent or a mixture of organic solvents, followed by dissolution of the starting substance at pH 3 to 8; (b) transformation of O-benzyl desvenlafaxine or its derivative of formula (II) to desvenlafaxine (I) by catalytic hydrogenation; (c) removing the catalyst from the desvenlafaxine solution with the pH value of 3 to 8 by filtration, followed by increasing pH to a value higher than 8 and lower than 11 by addition of an inorganic or organic base; (d) isolation of desvenlafaxine base (I) by filtration; and (e) transformation of desvenlafaxine base (I) to a pharmaceutically acceptable salt.
一种制备4-(2-(二甲基氨基)-1-(1-羟基环己基)乙基)苯酚的方法,其分子式为(I),通用名称为去甲文拉法辛,及其药用可接受的盐,包括以下步骤:(a)在有机溶剂或有机溶剂的混合物中搅拌O-苄基去甲文拉法辛或其分子式(II)的衍生物或其盐,其中R从H,4-甲基,4-甲氧基,3,4-二甲氧基,2-硝基,4-硝基,4-氯,4-溴,2,6-二氯和2,6-二氟中选择,然后在pH为3至8的条件下溶解起始物质;(b)通过催化氢化将O-苄基去甲文拉法辛或其分子式(II)的衍生物转化为去甲文拉法辛(I);(c)通过过滤将pH值为3至8的去甲文拉法辛溶液中的催化剂去除,然后通过添加无机或有机碱使pH值增加到大于8且小于11的值;(d)通过过滤分离去甲文拉法辛碱(I);(e)将去甲文拉法辛碱(I)转化为药用可接受的盐。