申请人:TOYAMA CHEMICAL CO., LTD.
公开号:EP0775702A1
公开(公告)日:1997-05-28
This invention relates to a novel quinolone- or naphthyridone-carboxylic acid derivative or its salt useful as an antibacterial agent, said derivative has a substituent represented by the following formula at the 7 position:
wherein preferably R3 represents at least one member selected from the group consisting of a hydrogen atom, a halogen atom, a substituted or unsubstituted lower alkyl, lower alkoxy or lower alkylthio group, a nitro group, a cyano group, a protected or unprotected hydroxyl group and a protected or unprotected amino group; R4 represents a hydrogen atom, a substituted or unsubstituted lower alkyl group, a lower alkylidene group and a group forming a cycloalkane ring together with the carbon atom to which R4 is bonded; and R5 represents a hydrogen atom or a substituted or unsubstituted lower alkyl or cycloalkyl group.
本发明涉及一种可用作抗菌剂的新型喹啉酮或萘啶酮羧酸衍生物或其盐,所述衍生物在 7 位具有下式所代表的取代基:
其中优选 R3 代表至少一个选自以下组成的成员:氢原子、卤素原子、取代或未取代的低级烷基、低级烷氧基或低级烷硫基、硝基、氰基、受保护或未受保护的羟基和受保护或未受保护的氨基;R4 代表氢原子、取代或未取代的低级烷基、低级亚烷基和与 R4 键合的碳原子一起形成环 烷环的基团;以及 R5 代表氢原子或取代或未取代的低级烷基或环烷基。