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 cephalosporins from 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
已使用先前概述的从青霉素核制备各种3-取代的头孢菌素的通用程序,并在需要时进行了修饰,以制备一系列在3-甲基中具有各种取代基的头孢氨苄的类似物。最有利于广谱抗菌活性的3-取代基是3-吡啶基甲基和间-或对-羧基苄基。该化合物仅在小鼠中经口服途径吸收较弱,但是3-(羧苄基)化合物比常规头孢菌素具有更长的有用血清水平。