申请人:Kyowa Hakko Kogyo Co., Ltd.
公开号:US04663450A1
公开(公告)日:1987-05-05
Optically active cephalosporin analogs of the formula ##STR1## wherein R.sub.2 represents a hydrogen or a group represented by the formula ##STR2## wherein R.sub.3 is a straight or branched lower alkyl group having 1 to 6 carbon atoms, a straight or branched lower alkoxy group having 1 to 6 carbon atoms or a phenyl group and R.sub.4 is a hydrogen or a straight or branched lower alkyl group having 1 to 6 carbon atoms; and A.sub.2 represents a straight or branched lower alkyl group having 1 to 6 carbon atoms or a straight or branched lower alkyl group having 1 to 6 carbon atoms which is substituted with one or two carboxyl groups, are useful as antibacterial agents.
光学活性头孢菌素类似物的公式为 ##STR1## 其中,R.sub.2代表氢或由公式##STR2##表示的基团,其中R.sub.3是具有1至6个碳原子的直链或支链低碳基团,具有1至6个碳原子的直链或支链低碳基团或苯基,而R.sub.4是氢或具有1至6个碳原子的直链或支链低碳基团; A.sub.2表示具有1至6个碳原子的直链或支链低碳基团或具有1至6个碳原子的直链或支链低碳基团,其被一个或两个羧基取代,作为抗菌剂是有用的。