There are disclosed 5-substituted-3-isoxazolecarboxylic acid derivatives having the general formula:
wherein X is a phenyl group, a thienyl group a furyl group or a pyridyl group, each of which groups optionally contains at least one substituent group, R is a phenyl group or a hydroxyphenyl group, and A is the following group:
wherein Y is;
(the carbon atom of Y to which the carboxyl group is attached, being attached to the nitrogen atom of A) wherein M is a hydrogen atom or a substituent group, and Z is a hydrogen atom, a hydroxy group, an acyloxy group, a carbamoyloxy group, an aromatic heterocyclethio group or an aromatic nitrogen-containing heterocycle quartemary ammonium group. The derivatives are useful as antibiotics.
公开了具有通式的 5-取代-3-
异噁唑羧酸衍
生物:
其中X是苯基、
噻吩基、
呋喃基或
吡啶基,每个基团可选择含有至少一个取代基,R是苯基或羟基苯基,A是以下基团:
其中 Y 是
(其中 M 是氢原子或取代基,Z 是氢原子、羟基、酰氧基、
氨基甲酰氧基、芳香杂环
硫基或芳香含氮杂环季
铵基。这些衍
生物可用作抗生素。