申请人:Cheil Foods & Chemicals, Inc.
公开号:US05527910A1
公开(公告)日:1996-06-18
Pyridone carboxylic acid compounds or physiologically hydrolyzable esters thereof are provided which are represented by the formula: ##STR1## wherein R.sub.1 is a lower alkyl, a halogen-substituted lower alkyl, a lower alkenyl, a cycloalkyl, or a substituted- or unsubstituted-phenyl group; R.sub.2 is a hydrogen atom, or a lower alkyl or an amino group; A is a nitrogen atom or the group C-X wherein X is a hydrogen or a halogen atom, or an alkoxy group; and Z is a group having the formula: ##STR2## wherein n is 1 or 2; R.sub.3 and R.sub.4 each represent a hydrogen atom or a lower alkyl group, with proviso that, if n is 2, one of R.sub.3 and R.sub.4 is a hydrogen atom; R.sub.5 and R.sub.6 each represent a hydrogen atom, or a hydroxy, a lower alkoxy or an amino group which is unsubstituted or substituted by a lower alkyl group, with proviso that one of R.sub.5 and R.sub.6 is a hydrogen atom; and R.sub.7 is a hydrogen atom or a lower alkyl group. The compounds of the present invention show potent and broad spectrum of antibacterial activities.
提供了由以下公式表示的吡啶酮羧酸化合物或生理水解酯:##STR1##
其中,R.sub.1是较低的烷基,卤代较低的烷基,较低的烯基,环烷基或取代或未取代的苯基;R.sub.2是氢原子,或较低的烷基或氨基;A是氮原子或基团C-X,其中X是氢原子或卤素原子,或烷氧基;Z是具有以下公式的基团:##STR2##
其中n为1或2;R.sub.3和R.sub.4分别表示氢原子或较低的烷基,但如果n为2,则R.sub.3和R.sub.4中的一个为氢原子;R.sub.5和R.sub.6分别表示氢原子,或未取代或取代较低烷基的羟基,较低烷氧基或氨基,但其中一个为氢原子;R.sub.7为氢原子或较低的烷基。本发明的化合物表现出强大和广谱的抗菌活性。