申请人:SUMIKA FINE CHEMICALS Co., Ltd.
公开号:EP1375487A1
公开(公告)日:2004-01-02
A process for producing quinoline-3-carboxylic acid represented by formula (3)
wherein R1, R2, R3, R4 and R5 have the same meanings as defined below, characterized by reacting 2-aminophenyl ketone represented by formula (1)
wherein R1 is an aryl group, a C1-12 alkyl group which may be branched, etc., and
R2 and R3 are each a hydrogen atom, a halogen atom, a C1-12 alkyl group which may be branched, etc., with a keto ester represented by formula (2)
R4COCH2CO2R5 (2)
wherein R4 is a C1-12 alkyl group which may be branched, a C3-6 cycloalkyl group, etc., and R5 is a C1-6 alkyl group which may be branched,
in the presence of an acid catalyst in an alcohol solvent while distilling off the alcohol.
一种生产由式(3)代表的喹啉-3-羧酸的工艺
其中 R1、R2、R3、R4 和 R5 与下文定义的含义相同,其特征在于使式(1)代表的 2-氨基苯基酮反应
其中 R1 是芳基、C1-12 烷基(可以是支链)等,以及
R2 和 R3 各为氢原子、卤素原子、可支链的 C1-12 烷基等,与式 (2) 所代表的酮酯反应
R4COCH2CO2R5 (2)
其中 R4 是一个可以是支链的 C1-12 烷基、一个 C3-6 环烷基等,R5 是一个可以是支链的 C1-6 烷基、
在有酸催化剂存在的情况下,在醇溶剂中蒸馏出醇。