[EN] METHOD FOR THE PREPARATION OF 2-AMINO-6-ETHYLBENZOIC ACID<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ACIDE 2-AMINO-6-ÉTHYLBENZOÏQUE
申请人:ACTIVE BIOTECH AB
公开号:WO2011054874A1
公开(公告)日:2011-05-12
The present invention relates to a novel method for the production of 2- amino-6-ethylbenzoic acid wherein7-amino-3-methylphtalide or 7-amino-3- hydroxy-3-methylphtalide is reduced to 2-amino-6-ethylbenzoic acid in water or in a mixture of a water miscible solvent and water at a pH of 7 or higher using a hydrogenation catalyst selected from Raney nickel and palladium based catalysts and using a hydrogen source selected from the group consisting of hydrogen gas, formic acid derivatives and cyclohexen. The invention also relates to 2-amino-6-ethylbenzoic acid produced with this method, and to use of such 2-amino-6-ethylbenzoic acid in the production of paquinimod.
本发明涉及一种用于生产2-氨基-6-乙基苯甲酸的新方法,其中将7-氨基-3-甲基邻苯二甲酸酐或7-氨基-3-羟基-3-甲基邻苯二甲酸酐在水中或水与水溶性溶剂的混合物中,在pH值为7或更高的条件下,使用从Raney镍和基于钯的催化剂中选择的氢化催化剂以及从氢气、甲酸衍生物和环己烯组成的羟基源,将其还原为2-氨基-6-乙基苯甲酸。该发明还涉及使用这种方法生产的2-氨基-6-乙基苯甲酸,以及将这种2-氨基-6-乙基苯甲酸用于生产帕奎尼莫德。