There is described a new class of ketohydroxyimino derivatives of cephalosporins of the formula ##STR1## wherein: R is an alkyl radical having from 2 to 4 carbon atoms, a phenyl, or a 5-membered heterocyclic radical which may be substituted, containing nitrogen, oxygen and/or sulphur; R.sup.1 is an acetoxy, carbamoyloxy or S-heterocyclic group, which may be substituted, and the heterocyclic ring is a 5- or 6-membered ring containing one or more nitrogen atoms, alone or combined with sulphur; R.sup.2 is hydrogen, alkyl or acetyl. The present compounds have an interesting broad-spectrum antibacterial activity.
描述了
头孢菌素的新类羰基羟
亚胺衍
生物,
化学式为##STR1##其中:R是具有2至4个碳原子的烷基基团,苯基或可能被取代的含氮、氧和/或
硫的5元杂环基团;R.sup.1是乙酰氧基、
氨基甲酰氧基或S-杂环基团,可能被取代,杂环环是含有一个或多个氮原子的5-或6-成员环,单独或与
硫结合;R.sup.2是氢、烷基或乙酰基。这些化合物具有广谱抗菌活性。