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.
Process of producing optically active cephalosporin analogs by enzyme
申请人:Kyowa Hakko Kogyo Co., Ltd.
公开号:US04302540A1
公开(公告)日:1981-11-24
Disclosed are optically active cephalosporin analogs which are produced by optically selective deacylation of an optically inactive acylated analog. The compounds are useful as intermediates in the preparation of optically active acylated antimicrobial agents.