申请人:Imperial Chemical Industries PLC
公开号:US05232918A1
公开(公告)日:1993-08-03
Cephalosporin derivatives having a 3-position substituent of formula I are described: ##STR1## wherein R.sup.1 is hydrogen, alkenyl or optionally substituted alkyl, Het is a 5- or 6-membered heterocyclic ring bonded via a carbon atom to the amide linkage, wherein Het is selected from a group of the formulae II-III: ##STR2## wherein A is CH or a nitrogen atom; B is oxygen, sulphur or a group NR.sup.4 ; one or two of D, E, F and G are nitrogen atoms and the remainder are CH groups: or Het is a pyrazinone, pyridinone, pyridazinone or pyrimidinone ring, or is a thione equivalent of such a ring, said rings having a substituent R.sup.4 on one nitrogen atom, or is pyranone, or pyranthione; the ring Het being fused by any two adjacent carbon atoms to the benzene ring; and Het being attached to the --CH.sub.2 NR.sup.1 CO-- group via a carbon atom; R.sup.2 is hydroxy or an in vivo hydrolysable ester thereof; R.sup.3 is ortho to R.sup.2 and is hydroxy or an in vivo hydrolysable ester thereof; and R.sup.4 has various values. The use of such compounds as antibacterial agents is described as are processes for their preparation and intermediates therefor.
本文描述了具有公式I的3位取代基的头孢菌素衍生物:##STR1##其中,R.sup.1是氢,烯基或可选取代的烷基,Het是通过碳原子与酰胺键连接的5-或6-成员杂环环,其中Het是从公式II-III的一组中选择的:##STR2##其中,A是CH或氮原子;B是氧、硫或基团NR.sup.4;D、E、F和G中的一或两个是氮原子,其余是CH基团;或者Het是吡唑酮、吡啶酮、吡嗪酮或嘧啶酮环,或是该环的硫醇等效物,在其中一个氮原子上具有取代基R.sup.4,或是吡喃酮或吡喃硫醇;环Het通过任意两个相邻的碳原子与苯环融合;并且Het通过碳原子连接到--CH.sub.2 NR.sup.1 CO--基团;R.sup.2是羟基或其体内可水解酯;R.sup.3位于R.sup.2的邻位,是羟基或其体内可水解酯;R.sup.4具有不同的值。本文描述了这些化合物作为抗菌剂的用途,以及它们的制备方法和中间体。