申请人:Pfizer Inc.
公开号:US05716948A1
公开(公告)日:1998-02-10
A compound of formula (I) or a salt thereof, 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.3 is a carboxy group or a carboxylate anion, or R.sup.3 is a readily removable carboxy protecting group or a pharmaceutically acceptable salt-forming group or in vivo hydrolysable ester group; R.sup.4 represents hydrogen or up to four substituents, which may be present on any of the carbon atoms in the ring system shown, selected from alkyl, alkenyl, alkynyl, alkoxy, hydroxy, halogen, amino, alkylamino, acylamino, dialkylamino, CO.sub.2 R, CONR.sub.2, SO.sub.2 NR.sub.2 where R is hydrogen or alkyl, aryl and heterocyclyl, which may be the same or different and wherein any R.sup.4 alkyl substituent is optionally substituted by one or more substituents selected from the list from which R.sup.4 is selected; Y is O, S, SO or SO.sub.2 ; and m is 1 or 2, a process for its preparation, use as an antibiotic and intermediates thereto.
化合物式(I)或其盐,其中R.sup.1是氢,甲氧基或甲酰胺基; R.sup.2是酰基,特别是一种抗菌活性头孢菌素的酰基; CO.sub.2 R.sup.3是羧基或羧酸盐离子,或R.sup.3是容易去除的羧保护基或药学上可接受的盐形成基或体内水解酯基; R.sup.4代表氢或最多四个取代基,在所示环系中的任何碳原子上可能存在,选自烷基,烯基,炔基,烷氧基,羟基,卤素,氨基,烷基氨基,酰胺基,二烷基氨基,CO.sub.2 R,CONR.sub.2,SO.sub.2 NR.sub.2,其中R是氢或烷基,芳基和杂环基,可以相同也可以不同,并且其中任何R.sup.4烷基取代基可以选择性地被来自R.sup.4选择列表的一个或多个取代基取代; Y是O,S,SO或SO.sub.2; m为1或2,其制备过程,用作抗生素的用途和中间体。