Novel quinolonecarboxylic acid derivatives of general formula (1) or salts thereof which have potent antibacterial effects on gram-positive bacteria in particular Propionibacterium acnes
(wherein R1 represents a hydrogen atom or a carboxyl-protective group; R2 represents an optionally substituted cycloalkyl group; R3 represents a hydrogen atom, a halogen atom, an optionally substituted alkyl, alkoxy or alkylthio group, an optionally protected hydroxyl or amino group, or a nitro group; R4 represents an optionally substituted alkyl or alkoxy group; and Z represents a pyridin-4-yl or pyridin-3-yl group which is optionally substituted with at least one group selected from a halogen atom, an optionally substituted alkyl, alkenyl, cycloalkyl, alkoxy, alkylthio or amino group and an optionally protected hydroxyl or amino group).
通用式(1)的新喹诺
酮羧酸衍
生物或其盐具有对革兰氏阳性细菌,特别是
丙酸杆菌具有强效的抗菌作用(其中R1代表氢原子或羧基保护基团;R2代表可选择取代的环烷基基团;R3代表氢原子、卤素原子、可选择取代的烷基、烷氧基或
硫代烷基基团、可保护的羟基或
氨基基团,或硝基基团;R4代表可选择取代的烷基或烷氧基基团;Z代表
吡啶-4-基或
吡啶-3-基,可选择取代至少一个基团,选自卤素原子、可选择取代的烷基、烯基、环烷基、烷氧基、
硫代烷基或
氨基基团以及可保护的羟基或
氨基基团)。