Expanding the scaffold for bacterial RNA polymerase inhibitors: design, synthesis and structure–activity relationships of ureido-heterocyclic-carboxylic acids
作者:Walid A. M. Elgaher、Martina Fruth、Matthias Groh、Jörg Haupenthal、Rolf W. Hartmann
DOI:10.1039/c3ra45820b
日期:——
an alternative mode of action. Based on class I, developed in our previous study, a new series of RNA polymerase (RNAP) inhibitors targeting the switch region was designed. Feasible synthetic procedures for the aryl-ureido-heterocyclic-carboxylic acids were developed including three regioisomeric thiophene classes (II–IV), as well as three isosteric furan (V, VI) and thiazole (VII) classes. Biological
细菌抗药性的出现要求开发具有替代作用方式的新抗生素。基于我们先前研究中开发的I类,设计了一系列针对开关区域的RNA聚合酶(RNAP)抑制剂新系列。开发了可行的芳基-脲基-杂环羧酸合成方法,包括三种区域异构的噻吩类(II-IV)以及三种等位呋喃(V,VI)和噻唑(VII)类。使用RNAP转录抑制分析的生物学评估显示,II类化合物具有与亲本I类相同的活性,而III类,V–VII类具有活性,但效力较低。分子模型支持的结构-活性关系(SAR)研究,阐明了与结合位点相互作用所必需的结构要求。除RNAP抑制作用外,新化合物还对革兰氏阳性菌和革兰氏阴性菌显示出良好的抗菌活性。大肠杆菌TolC菌株。而且,它们与临床使用的RNAP抑制剂利福平(Rif)没有交叉耐药性,并且与Rif相比,耐药率更低。