[EN] A PROCESS FOR THE PREPARATION OF HIGHLY PURE 4-(4-METHYL PIPERAZINOMETHYL) BENZOIC ACID DIHYDROCHLORIDE<br/>[FR] PROCÉDÉ DE PRÉPARATION D'UN DICHLORHYDRATE D'ACIDE 4-(4-MÉTHYLPIPÉRAZINO- MÉTHYL)BENZOÏQUE TRÈS PUR
申请人:NATCO PHARMA LTD
公开号:WO2013008242A1
公开(公告)日:2013-01-17
This invention relates to the preparation of highly pure (>99%) 4-(4-methyl piperazinomethyl) benzoic acid dihydrochloride (I) from commercially available and inexpensive starting materials with enhanced yields. Thus title compound (I) is prepared by the reaction of 4-bromomethyl benzoic acid (II) with 1-methyl piperazine in potassium carbonate presence and in n-butanol medium at room temperature. This invention also provides process for the preparation of 4-bromomethyl benzoic acid (II)
本发明涉及从商业上可获得的廉价起始材料中制备高纯度(> 99%)4-(4-甲基哌嗪甲基)苯甲酸二盐酸盐(I)的方法,并提高了产量。因此,通过在室温下在钾碳酸盐存在下,在正丁醇介质中将4-溴甲基苯甲酸(II)与1-甲基哌嗪反应来制备标题化合物(I)。本发明还提供了制备4-溴甲基苯甲酸(II)的方法。