Azoalkyl ether imidazo[2,1-b]benzothiazoles as potentially antimicrobial agents with novel structural skeleton
作者:Swetha Kameswari Maddili、Zhen-Zhen Li、Vijaya Kumar Kannekanti、Rammohan R. Yadav Bheemanaboina、Balaraju Tuniki、Vijai Kumar Reddy Tangadanchu、Cheng-He Zhou
DOI:10.1016/j.bmcl.2018.06.016
日期:2018.8
A series of new azoalkyl ether imidazo[2,1-b]benzothiazoles were developed via a convenient synthetic procedure. The antimicrobial assays showed that a good number of the prepared derivatives exhibited significant inhibitory properties against most of the tested strains. Especially 2-methyl-5-nitroimidazole derivative 5a presented superior inhibit activity against MRSA and B. typhi with MIC = 4 μg/mL
通过便利的合成方法开发了一系列新的偶氮烷基醚咪唑并[2,1- b ]苯并噻唑。抗菌测定表明,大量制备的衍生物对大多数测试菌株均表现出显着的抑制特性。特别是2-甲基-5-硝基咪唑衍生物5a对MRSA和伤寒杆菌表现出优异的抑制活性,分别为MIC = 4μg/ mL和MIC = 1μg/ mL。高活性化合物5a对哺乳动物细胞显示出低毒性,而没有明显触发细菌抗性的产生,并且还具有快速的杀菌功效。分子对接研究暴露出活性分子5a可以通过氢键与金黄色葡萄球菌回旋酶的活性位点相互作用。还进行了量子化学研究以解释高抗菌活性。进一步的研究表明,化合物5a可以通过氢键与回旋酶-DNA复合物显着缔合,并且可以有效地插入MRSA DNA中,形成5a- DNA超分子复合物,具有强大的生物活性。