Discovery and Preliminary Structure-Activity Investigation of 3-Substituted-1H-imidazol-5-yl-1H-indoles with In Vitro Activity towards Methicillin-Resistant Staphylococcus aureus
作者:Steven A. Li、Rebecca J. Zheng、Kenneth Sue、Marie-Lise Bourguet-Kondracki、Azza Troudi、Jean Michel Brunel、Brent R. Copp、Melissa M. Cadelis
DOI:10.3390/antibiotics11101450
日期:——
extensive library of analogues was prepared using the Van Leusen three-component reaction, biological evaluation of which led to the identification of two analogues (26 and 32) with favorable anti-MRSA activity (MIC ≤ 0.25 µg/mL) which also lacked cytotoxic or hemolytic properties. The screening campaign also identified two derivatives, a phenethyl-indole-imidazole 57 and a 5-phenyl-1H-imidazole 111 that
抗生素能够治愈传染病并预防免疫功能低下者的感染,因此成为现代医学拯救生命的基石。它们的大量使用导致抗生素耐药细菌的发生率急剧增加,从而迫切需要具有新作用机制的抗生素。作为我们寻找新抗菌药物的一部分,我们筛选了内部化合物库,并确定了两种 3-取代-1 H -咪唑-5-基-1 H -吲哚作为弱生长抑制剂 (MIC 16 µg/mL)耐甲氧西林金黄色葡萄球菌(MRSA)。使用 Van Leusen 三组分反应制备了一个广泛的类似物库,对其进行生物学评估,鉴定出具有良好抗 MRSA 活性 (MIC ≤ 0.25 µg/mL) 且缺乏细胞毒性的两种类似物( 26和32 )或溶血特性。筛选活动还鉴定出两种衍生物,苯乙基吲哚咪唑57和 5-苯基-1 H-咪唑111 ,它们是针对新型隐球菌的无毒选择性抗真菌剂。这些结果已确定 3-取代-1 H -咪唑-5-基-1 H -吲哚和 5-苯基-1 H -咪唑作为新的结构支架,分别作为抗
Converting oxazoles into imidazoles: new opportunities for diversity-oriented synthesis
作者:Thibaut Alzieu、Johannes Lehmann、Ajay B. Naidu、Rainer E. Martin、Robert Britton
DOI:10.1039/c3cc48467j
日期:——
We report the optimization of a neglected reaction for the rapid and direct conversion of oxazoles into N-substituted imidazoles. The utility of this microwave-promoted reaction for diversity-oriented synthesis is demonstrated in the preparation of >40 N-substituted imidazoles, including alpha-imidazolyl esters.