PROCESSES FOR PRODUCING 7-ISOINDOLINE-QUINOLONECARBOXYLIC ACID DERIVATIVE AND ITS INTERMEDIATE, AS WELL AS SALT OF 7-ISOINDOLINE-QUINOLONECARBOXYLIC ACID DERIVATIVE, ITS HYDRATE AND COMPOSITION COMPRISING THE SAME AS ACTIVE INGREDIENT
申请人:Yamada Minoru
公开号:US20070225506A1
公开(公告)日:2007-09-27
Process for producing a 7-bromoquinolone-carboxylic acid derivative of the following formula or its salt
by reacting a 2,4-dibromo-3-hydroxybenzoic acid ester compound of the formula
R
7a
-
x
to obtain a 3-alkoxy-2,4-dibromobenzoic acid ester, subjecting the 3-alkoxy-2,4-dibromobenzoic acid ester to elimination reaction of the carboxyl-protecting group to obtain a 3-alkoxy-2,4-dibromobenzoic acid, subjecting the 3-alkoxy-2,4-dibromobenzoic acid to ketoesterification reaction to obtain a 3-alkoxy-2,4-dibromobenyolacetic acid ester, reacting the 3-alkoxy-2,4-dibromobenzoylacetic acid ester with an orthoester or an acetal, then reacting the reaction product with a compound of the formula R
2
— NH or its salt to obtain a 2-(3-alkoxy-2,4-dibromobenzoyl)-3-substituted aminoacrylic acid ester and subjecting the 2-(3-alkoxy-2,4-dibromobenzoyl)-3-substituted aminoacrylic acid ester to ring-closing reaction, and products thereof.
通过反应公式为R7a-x的2,4-二溴-3-羟基苯甲酸酯化合物以获得3-烷氧基-2,4-二溴苯甲酸酯,将3-烷氧基-2,4-二溴苯甲酸酯进行羧基保护基的消除反应以获得3-烷氧基-2,4-二溴苯甲酸,将3-烷氧基-2,4-二溴苯甲酸进行酮酯化反应以获得3-烷氧基-2,4-二溴苯乙酸酯,将3-烷氧基-2,4-二溴苯乙酸酯与orthoester或缩醛反应,然后将反应产物与公式为R2-NH或其盐的化合物反应以获得2-(3-烷氧基-2,4-二溴苯甲酰)-3-取代氨基丙烯酸酯,将2-(3-烷氧基-2,4-二溴苯甲酰)-3-取代氨基丙烯酸酯进行环闭合反应,从而获得以下公式或其盐的7-溴喹啉羧酸衍生物的制备方法和产物。