申请人:KYORIN PHARMACEUTICAL CO., LTD.
公开号:EP0275971A1
公开(公告)日:1988-07-27
The present invention is concerned with a certain novel process for the preparation of a quinolonecarboxylic acid of the following formula;
and with intermediates of the following formula;
wherein R is hydrogen atom or lower alkyl group, X is halogen atom, R¹ and R² each defined independently are hydrogen atom or a protective group for the amino group, or R¹ together with R² is a protective group, and
wherein R, R¹, R² and X are as defined above.
本发明涉及一种新型的制备喹诺酮羧酸的方法,其化学式如下;以及以下化学式的中间体;其中R是氢原子或较低的烷基,X是卤原子,R¹和R²各自独立地定义为氢原子或氨基保护基,或者R¹和R²一起是保护基,其中R、R¹、R²和X如上所定义。