申请人:Wakunaga Pharmaceuticals Co., Ltd.
公开号:US05998436A1
公开(公告)日:1999-12-07
A pyridonecarboxylic acid derivative represented by the following general formula (1): ##STR1## [wherein R.sup.1 represents hydrogen atom or a carboxyl protective group; R.sup.2 represents hydroxyl group, a lower alkoxy group, or a substituted or unsubstituted amino group; R.sup.3 represents hydrogen atom or a halogen atom; R.sup.4 represents hydrogen atom or a halogen atom; R.sup.5 represents a halogen atom or an optionally substituted saturated cyclic amino group; R.sup.6 represents hydrogen atom, a halogen atom, nitro group, or an optionally protected amino group; X, Y and Z may be the same or different and respectively represent nitrogen atom, --CH.dbd. or --CR.sup.7 .dbd. (wherein R.sup.7 represents a lower alkyl group, a halogen atom, or cyano group) (with the proviso that at least one of X, Y and Z represent the nitrogen atom), and W represents nitrogen atom or --CR.sup.8 .dbd. (wherein R.sup.8 represents hydrogen atom, a halogen atom, or a lower alkyl group)] or its salt, as well as an antibacterial agent containing such compound are provided.
提供一种由以下一般式(1)表示的吡啶酮羧酸衍生物:##STR1## [其中R.sup.1表示氢原子或羧基保护基;R.sup.2表示羟基,较低的烷氧基或取代或未取代的氨基;R.sup.3表示氢原子或卤素原子;R.sup.4表示氢原子或卤素原子;R.sup.5表示卤素原子或可选择取代的饱和环氨基;R.sup.6表示氢原子,卤素原子,硝基或可选择保护的氨基;X,Y和Z可以相同或不同,分别表示氮原子,--CH.dbd.或--CR.sup.7.dbd.(其中R.sup.7表示较低的烷基,卤素原子或氰基)(具有至少一个X,Y和Z表示氮原子的条件),W表示氮原子或--CR.sup.8.dbd.(其中R.sup.8表示氢原子,卤素原子或较低的烷基)]或其盐,以及含有这种化合物的抗菌剂。