申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US03984397A1
公开(公告)日:1976-10-05
A process for the preparation of ##SPC1## Which comprises reacting ##SPC2## With a base, wherein Y is a residue of an acid, wherein R.sup.1 is amino, (halophenylimino-1-lower alkanoylthiomethyl)amino or acylamino and wherein R.sup.2 is carboxy or a protected carboxy, R.sup.3 is lower alkyl, R.sup.4 is lower alkylene and X is --S-- or ##EQU1##
制备##SPC1##的方法包括将##SPC2##与碱反应,其中Y是酸的残基,R.sup.1是氨基,(卤代苯基亚-1-较低烷酰硫甲基)氨基或酰胺基,R.sup.2是羧基或受保护的羧基,R.sup.3是较低烷基,R.sup.4是较低烷基烯基,X是--S--或##EQU1##