The facile synthesis of seven new dicationic tripeptide benzyl ester derivatives, with hydrophobic group variations in the C-terminal amino acid component, is described. Moderate to good activity was seen against Gram-positive bacteria in vitro. One cyclohexyl-substituted compound 2c was tested more widely and showed good potency (MIC values ranging from 2–4 μg/mL) against antibiotic-resistant strains of Staphylococcus aureus and Enterococci (VRE, VSE), and against Staphylococcus epidermidis.
本文描述了七个新的二阳离子三肽苄酯衍生物的简单合成,C-末端氨基酸组分具有疏水基团的变化。在体外对革兰氏阳性细菌表现出中等到良好的活性。其中一个环己基取代的化合物2c被广泛测试,并显示出对抗抗生素耐药菌株的良好效力(最小抑菌浓度值范围为2-4μg/mL),包括金黄色葡萄球菌和肠球菌(耐药和敏感菌株),以及表皮葡萄球菌。