Studies on .BETA.-lactam antibiotics. IV. An improved synthesis of 3-(isothiazolylythiomethyl)cephalosporins and its application to new derivatives.
作者:RYUICHIRO HARA、EI-ICHI NAKAI、HIROYUKI HISAMICHI、NORIAKI NAGANO
DOI:10.7164/antibiotics.47.477
日期:——
An improved synthesis and in vitro activity of cephalosporins with a (4-carboxy-3-hydroxy-5-isothiazolyl)thiomethyl group at the 3-position and its application to the preparation of new derivatives are described. These compounds showed excellent activity against Gram-negative bacteria including β-lactamase producing strains. Among them, 2f was the most interesting because of its broad spectrum of antibacterial activity, including Gram-positive bacteria, and its outstanding inhibitory potency against Pseudomonas aeruginosa.
描述了一种改进的合成方法以及在体外对具有(4-羧基-3-羟基-5-异噻唑基)硫甲基基团位于3位的头孢菌素的活性,并应用于新衍生物的制备。这些化合物对包括β-内酰胺酶产生菌株在内的革兰氏阴性菌表现出优异的活性。在这些化合物中,2f最引人注目,因为它对革兰氏阳性菌具有广谱抗菌活性,并且对铜绿假单胞菌表现出卓越的抑制效力。