Processes for producing 7-isoindoline-quinolone carboxylic 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:Ojima Katsuji
公开号:US20050203301A1
公开(公告)日:2005-09-15
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
2a
—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.
通过将公式如下的2,4-二溴-3-羟基苯甲酸酯化合物R7a-x与反应,得到一种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,得到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,得到3-烷氧基-2,4-二溴苯基乙酸酯;将3-烷氧基-2,4-二溴苯基乙酸酯与正酯或缩醛反应,然后将反应产物与公式为R2a—NH或其盐的化合物反应,得到一种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,得到公式如下的7-溴喹啉羧酸衍生物或其盐,以及其制备方法。