NOVEL PYRIDONECARBOXYLIC ACID DERIVATIVES OR SALTS THEREOF AND DRUGS CONTAINING THE SAME AS THE ACTIVE INGREDIENT
申请人:WAKUNAGA PHARMACEUTICAL CO., LTD.
公开号:EP0945435A1
公开(公告)日:1999-09-29
The invention relates to pyridonecarboxylic acid derivatives represented by the general formula (1):
wherein R1 is -OH, a carboxy-protecting group or (alkyl)-amino group, R2 is H, or -NO2, (protected) amino, (protected) hydroxyl, lower alkyl or lower alkoxyl group, R3 is a halogen atom, H, or -NO2, lower alkyl, lower alkoxyl or amino group, R4 is an azido, (substituted) hydrazino, (substituted) amino, lower alkoxyl or hydroxyl group, R5, R6 and R7 are independently H, -NO2, halogen atom or lower alkyl group, R8 is a -NO2, (substituted) amino, -OH or lower alkoxyl group, A is N or C-R12, in which R12 is H, halogen atom, or (substituted) lower alkyl, lower alkenyl, lower alkynyl, lower alkoxyl, lower alkylthio or nitro group, and B is N or C-R13, in which R13 is H or halogen atom, or salts thereof, and medicine comprising such a compound as an active ingredient. The derivatives or the salts thereof exhibit excellent antibacterial action and peroral absorbability, scarcely cause side effects, and are easy of synthesis.
本发明涉及通式(1)所代表的吡啶甲酸衍生物:
其中 R1 是-OH、羧基保护基团或(烷基)-氨基;R2 是 H、或-NO2、(保护)氨基、(保护)羟基、低级烷基或低级烷氧基;R3 是卤素原子、H、或-NO2、低级烷基、低级烷氧基或氨基;R4 是叠氮基、(取代的)肼基、(取代的)氨基、低级烷氧基或羟基;R5、R6 和 R7 独立地是 H、-NO2、A是N或C-R12,其中R12是H、卤素原子或(取代的)低级烷基、低级烯基、低级炔基、低级烷氧基、低级烷硫基或硝基,B是N或C-R13,其中R13是H或卤素原子,或其盐,以及包含此类化合物作为活性成分的药物。这些衍生物或其盐具有出色的抗菌作用和口腔吸收性,几乎不会产生副作用,而且易于合成。