Cephalosporin derivatives, process for their preparation and pharmaceutical preparations containing them
申请人:BEECHAM GROUP PLC
公开号:EP0061234A2
公开(公告)日:1982-09-29
The present invention provides a compound of the formula (1):
and pharmaceutically acceptable salts and in-vivo hydrolysable esters thereof wherein R' is carboxy, R2 is hydrogen or carboxy, R3 is hydrogen, acyl, C1-6 alkyl or C2-6 alkenyl, any of such R3 groups being optionally substituted, and R4 is an amino or protected amino group.
Processes for the preparation of these compounds are described as is their use in the treatment of bacterial infection.
Structure-activity relations in cephalosporins prepared from penicillins. 2. Analogs of cephalexin substituted in the 3-methyl group
作者:Edward G. Brain、A. John Eglington、Brian G. James、John H. C. Nayler、Neal F. Osborne、Michael J. Pearson、Terence C. Smale、Robert Southgate、Patricia Tolliday
DOI:10.1021/jm00218a019
日期:1977.8
A previously outlined general procedure for preparing various 3-substituted cephalosporinsfrom the penicillin nucleus has been used, with modifications where required, to prepare a series of analogues of cephalexin with various substituents in the 3-methyl group. The 3-substituents most conducive to broad-spectrum antibacterial activity were 3-pyridylmethyl and m- or p-carboxybenzyl. The compounds