Various acylamido derivatives of 3-trifluoromethyl-3-cephem-4-carboxylic acid were synthesized and tested for in vitro antibacterial activities. The 3-trifluoromethylcephalosporin derivatives synthesized herein are 7α- and 7β-acylamido-3-cephem-, 7α- methoxy-7β-acylamido-3-cephem- and 7β-acylamido-2-cephem-4-carboxylic acids. Among these compounds, the R-mandelamido derivative (IIIb) showed the highest antibacterial activity against gram-negative bacteria at pH 7.0. The minimum inhibitory concentration values of the 2-thienylacetamido- and phenylglycylamido derivatives are compared with those of the 3-methyl- and 3-chloro analogs, and structure-activity relationships are discussed.
合成了 3-三
氟甲基-3-头孢-4-
羧酸的各种酰
氨基衍
生物,并进行了体外抗菌活性测试。本文合成的 3-三
氟甲基
头孢菌素衍
生物是 7α- 和 7β- 乙酰
氨基-3-头孢-、7α-甲氧基-7β-乙酰
氨基-3-头孢-和 7β- 乙酰
氨基-2-头孢-4-
羧酸。在这些化合物中,R-扁桃酰
氨基衍
生物(IIIb)在 pH 值为 7.0 时对革兰氏阴性菌的抗菌活性最高。将 2-
噻吩乙酰胺基和苯基甘
氨酰
氨基衍
生物的最小抑菌浓度值与 3-甲基和 3-
氯类似物的最小抑菌浓度值进行了比较,并讨论了结构-活性关系。