申请人:Beecham Group p.l.c.
公开号:US05158946A1
公开(公告)日:1992-10-27
.beta.-Lactam compounds of the formula (I) including pharmaceutically acceptable salts and in vivo hydrolysable esters, processes for their preparation and their use as antibiotics: ##STR1## wherein R.sup.1 is hydrogen, methoxy or formamido; R.sup.2 is an acyl group, in particular that of an antibacterially active cephalosporin; R.sup.3 is hydrogen or a readily removable carboxy protecting group (such as a pharmaceutically acceptable in-vivo hydrolysable ester group); R.sup.4 is a .gamma.- or .delta.-lactone ring optionally containing one or (where applicable) two endocyclic double bonds, which ring is optionally substituted at any carbon atom by alkyl, dialkylamino, alkoxy, hydroxy, halogen or aryl, which in the case of more than one substituent may be the same or different, or is optionally di-substituted at two adjacent carbon atoms, which are available for substitution, to form an aromatic fused bicyclic system; x and y are independently 0 or 1; X is S, SO, SO.sub.2, O or CH.sub.2 ; and Y is O or S.
.beta.-内酰胺化合物的公式(I),包括药学上可接受的盐和体内可水解的酯,其制备过程以及作为抗生素的用途:其中R.sup.1是氢,甲氧基或甲酰基;R.sup.2是酰基,特别是抗菌活性头孢菌素的酰基;R.sup.3是氢或容易去除的羧基保护基(例如,药学上可接受的体内水解酯基);R.sup.4是.γ.-或.δ.-内酯环,可选地含有一个或(如适用)两个内环双键,该环在任何碳原子上可选择性地被烷基,二烷基氨基,烷氧基,羟基,卤素或芳基取代,如果有多个取代基,则可以相同或不同,或可选择性地在两个相邻的碳原子上进行双取代,以形成一个芳香融合的双环系统;x和y独立地为0或1;X为S,SO,SO.sub.2,O或CH.sub.2;Y为O或S。