The synthesis and microbiological evaluation of a new series of 3-thiazol-4-yl-carba-1-dethiacephalosporins is described. Structure activity relationship was achieved by changing substitution at the 2-position of the thiazole moiety. The result was a marked variance of microbiological activity in the C7 side-chain derivatives. ATMO derivatives possess potent activity against both Gram-positive and Gram-negative bacteria. For example, MICs (μg/ml) of LY215226 against representative organisms are as follows: S. aureus 0.25, S. pneumoniae 0.008, H. influenzae 0.008, E. coli 0.25, K. pneumoniae 0.008, E. cloacae 0.5, S. typhi 0.25, and M. morganii 0.25.
描述了一系列新的3-
噻唑-4-基-卡巴-1-去
硫头孢菌素的合成和微
生物学评估。通过改变
噻唑部分的2位取代来实现结构-活性关系。结果表明,C7侧链衍
生物在微
生物活性上存在明显差异。ATMO衍
生物对革兰阳性和革兰阴性细菌均具有强效活性。例如,LY215226对典型微
生物的最低抑菌浓度(MIC,μg/ml)如下:
金黄色葡萄球菌0.25,肺炎链球菌0.008,流感嗜血杆菌0.008,大肠杆菌0.25,肺炎克雷伯菌0.008,克隆氏菌0.5,伤寒沙门氏菌0.25,以及摩根氏菌0.25。