The present invention relates to a novel method for the production of 2-amino-6-ethylbenzoic acid wherein 7-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 paquini-mod.
本发明涉及一种生产
2-氨基-6-乙基苯甲酸的新方法,其中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
水亲和溶剂和
水的混合物中,在pH为7或更高的条件下,使用Raney
镍和基于
钯的催化剂以及来自
氢气、
甲酸衍
生物和
环己烯的氢源将其还原为
2-氨基-6-乙基苯甲酸。本发明还涉及使用此方法生产的
2-氨基-6-乙基苯甲酸,以及在生产paquini-mod时使用此类
2-氨基-6-乙基苯甲酸的用途。