Synthesis and biological evaluation of novel N-2,4-dimethoxyphenyl dithiolopyrrolone derivatives as bacterial RNA polymerase inhibitors
作者:Jieyun Meng、Bo Kong、Juan Wang、Xinping Yang、Yubin Lv、Liang Lyu、Zhimin Jiang、Xiangduan Tan
DOI:10.1007/s00044-020-02550-3
日期:2020.8
Eighteen novel N-2,4-dimethoxyphenyl dithiolopyrrolone derivatives inhibiting bacterial RNA polymerase (RNAP) were synthesized based on dithiolopyrrolone scaffold. Some compounds displayed potent antimicrobial activity against Gram-positive bacteria of Staphylococcus aureus and Streptococcus pneumoniae, but not the Gram-negative bacteria of Escherichia coli and Pseudomonas aeruginosa. Moreover, the
基于二硫代吡咯烷酮支架,合成了十八种抑制细菌RNA聚合酶(RNAP)的N -2,4-二甲氧基苯基二硫代吡咯烷酮衍生物。一些化合物对金黄色葡萄球菌和肺炎链球菌的革兰氏阳性菌显示出有效的抗菌活性,而对大肠杆菌和铜绿假单胞菌的革兰氏阴性菌则没有。而且,最有前途的化合物7b中显示了强的抗菌活性对MRSA,VRSA,RRSA,和MPRSP的临床分离株与MIC值在0.125-2微克/毫升的范围内,以及对有效的抑制活性的大肠杆菌RNA聚合酶与IC 50值为19.4±1.3μM。此外,化合物7b对LO2细胞显示出细胞毒性,IC 50值为18.5±1.89μM。分子对接研究表明,化合物7b与细菌RNAP的开关区域相互作用。综上所述,化合物7b可能充当开发有效细菌RNAP抑制剂的先导结构。