title: Studies on beta-lactam antibiotics. III. Synthesis and enzymatic stability of 3-acyloxymethyl-7 beta-[(Z)-2-(2-amino-4-thiazolyl)-2-(methoxyimino)acetamido]-3-cephem-4-carboxylic acids.
abstract: 3-Acyloxymethyl-7 beta-[(Z)-2-(2-amino-4-thiazolyl)-2-(methoxyimino) acetamido]-3-cephem-4-carboxylic acids (7) were synthesized. The stability of 7 to enzymatic hydrolysis and their antimicrobial activity were evaluated. 7 showed good antimicrobial activity against a wide range of microorganisms. Cephems (7b and 7c) with sterically more hindered acyl groups such as t-butyl and cyclohexyl were most resistant to enzymatic hydrolysis.
mesh_terms: D000818:Animals; D001419:Bacteria / Q000187:drug effects; D002511:Cephalosporins / Q000138:chemical synthesis* / Q000378:metabolism / Q000494:pharmacology; D004355:Drug Stability; D006868:Hydrolysis; D008099:Liver / Q000378:metabolism; D051381:Rats
chemical_list: D002511:Cephalosporins