申请人:Beecham Group p.l.c.
公开号:US05246926A1
公开(公告)日:1993-09-21
.beta.-Lactam compounds of the formula (Ia) 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; CO.sub.2 R.sup.6 is a carboxy group or a carboxylate anion; R.sup.3 is a Y-lactone ring optionally containing an endocyclic double bond, 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; and X is S, SO, SO.sub.2, O or CH.sub.2.
.beta.-内酰胺化合物的公式(Ia),包括药学上可接受的盐和体内可水解的酯,其制备过程以及它们作为抗生素的用途:##STR1##其中,R.sup.1是氢、甲氧基或甲酰胺基;R.sup.2是酰基,特别是抗菌活性头孢菌素的酰基;CO.sub.2R.sup.6是羧基或羧酸盐离子;R.sup.3是Y-内酯环,可选地含有内环双键,该环在任何碳原子处可选地被烷基、二烷基氨基、烷氧基、羟基、卤素或芳基取代,若有多个取代基,则可相同或不同,或可选地在两个相邻的碳原子上二取代,这些碳原子可用于取代,以形成芳香融合双环系统;X是S、SO、SO.sub.2、O或CH.sub.2。