Cephalosporin compounds of general formula
(wherein
Q represents a cyclopropylmethyl goup,
Y represents an optionally blocked carboxyl group or an optionally N-mono- or N,N-di-alkyl substituted carbamoyl group,
Z represents hydrogen, optionally N-substituted carbamoyloxy, heterocyclicthio or optionally substituted pyridinium or bicyclicpyridinium,
R represents an optionally protected amino group,
R2 represents a hydrogen atom or a carboxyl blocking group,
B represents -S- or >S-0, and the dotted line indicates Δ2 or Δ3 unsaturation) and salts thereof.
The Δ3sulphide compounds exhibit a particularly advantageous profile of antibiotic activity against both Gram-positive and Gram-negative and organisms, including β-lactamase-producing strains.
Methods of preparing the compounds of the invention are described, as is the use of the compounds as active antibiotics and as precursors therefor.
通式如下的
头孢菌素化合物
其中
Q 代表
环丙基甲基、
Y 代表任选封端羧基或任选 N-单烷基或 N,N-二烷基取代的
氨基甲酰基、
Z 代表氢、任选 N-取代的
氨基甲酰氧基、杂环
硫基或任选取代的
吡啶鎓或双环
吡啶鎓、
R 代表任选受保护的
氨基、
R2 代表氢原子或羧基封端基团、
B 代表 -S- 或 >S-0,虚线表示 Δ2 或 Δ3 不饱和)及其盐。
Δ3
硫化物化合物对革兰氏阳性和革兰氏阴性以及包括产β-内酰胺酶菌株在内的
生物体都具有特别有利的抗生素活性。
本文描述了制备本发明化合物的方法,以及这些化合物作为活性抗生素及其前体的用途。