申请人:Farmitalia Carlo Erba, S.r.l.
公开号:US04886793A1
公开(公告)日:1989-12-12
There are provided compounds of formula I: ##STR1## wherein R.sup.1 is hydrogen or a C.sub.1 -C.sub.4 alkyl group either unsubstituted or substituted by one or more substituents chosen from a free or protected hydroxy or halogen atom; R.sup.2 is a free or esterified carboxy group or carboxylate anion; R.sup.3 and R.sup.4 are each independently hydrogen or organic group, X is --O--, ##STR2## --S--, Q is either (a") free or protected hydroxy, or (b") a C.sub.1 -C.sub.1 acyloxy, or (c") carbamoyloxy OCONH.sub.2, or (d") an optionally substituted heterocyclylthio group, or (e") an optionally substituted imido group, or (f") an optionally substituted quaternary ammonium group or (g") a halogen atom, A and the pharmaceutically or veterinarily acceptable salts thereof. There are provided also methods for preparing compounds of formula I. The compounds of formula I are useful as antibacterial agents.
提供了I式化合物:##STR1## 其中,R.sup.1是氢或C.sub.1-C.sub.4烷基,可以未取代或被一个或多个取代基所取代,所述取代基选自自由或受保护的羟基或卤原子;R.sup.2是自由或酯化的羧基或羧酸根离子;R.sup.3和R.sup.4各自独立地是氢或有机基团;X是--O--,##STR2## --S--;Q是(a")自由或受保护的羟基,或(b") C.sub.1-C.sub.1酰氧基,或(c")氨基甲酰氧基OCONH.sub.2,或(d")一个可选取代的杂环基硫基团,或(e")一个可选取代的亚胺基团,或(f")一个可选取代的季铵基团或(g")一个卤原子;A及其药学或兽医学上可接受的盐也被提供。还提供了制备I式化合物的方法。I式化合物可用作抗菌剂。