3-Benzyl-7-amino-3-cephem-4-carboxylic acid, the tertiary butyl ester,
申请人:Beecham Group Limited
公开号:US03974154A1
公开(公告)日:1976-08-10
3-BENZYL-7-AMINO-3-CEPHEM-4-CARBOXYLIC ACID AND ESTERS AND PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF.
3-苄基-7-氨基-3-头孢-4-羧酸及其酯和药用可接受盐。
3-(2'-Tetrahydropyr
申请人:Beecham Group Limited
公开号:US03959267A1
公开(公告)日:1976-05-25
This invention relates to novel substituted ceph-3-ems some of which are of value as intermediates in the synthesis of antimicrobially active cephalosporin analogues whilst others are useful as antimicrobial agents in their own right. The invention is described in Part D of this specification. Parts A, B, C and E relate to starting materials and processes necessary for the preparation of the novel cephems.
3-Benzyl-7-triphenylmethylamino-3-cephem-4-carboxylic acid and salts and
申请人:Beecham Group Limited
公开号:US03975383A1
公开(公告)日:1976-08-17
Substituted ceph-3-ems having a substituted amino side chain in the 7-position, carboxylic acid or a salt or ester thereof in the 4-position and a benzyl or monohalobenzyl group in the 3-position.
3-Benzyl-7-substituted acetamido-3-cephem-4-carboxylic acids and
申请人:Beecham Group Limited
公开号:US03939157A1
公开(公告)日:1976-02-17
Antimicrobially active ceph-3-ems having in the 3-position a benzyl or mono-halobenzyl group, preferably with the mono-halo group in the para-position of the phenyl part of the benzyl group.