Novel 3-Aminothiazolquinolones: Design, Synthesis, Bioactive Evaluation, SARs, and Preliminary Antibacterial Mechanism
作者:Sheng-Feng Cui、Dinesh Addla、Cheng-He Zhou
DOI:10.1021/acs.jmedchem.5b01678
日期:2016.5.26
A series of novel 3-aminothiazolquinolones as analogues of quinolone antibacterial agents were designed and synthesized in an effort to circumvent quinolone resistance. Among these 3-aminothiazolquinolones, 3-(2-aminothiazol-4-yl)-7-chloro-6-(pyrrolidin-1-yl) quinolone 12b exhibited potent antibacterial activity, low cytotoxicity to hepatocyte cells, strong inhibitory potency to DNA gyrase, and a broad
设计并合成了一系列新颖的3-氨基噻唑喹诺酮类药物作为喹诺酮类抗菌剂,以规避喹诺酮类药物的耐药性。在这些3-氨基噻唑喹诺酮类中,3-(2-氨基噻唑-4-基)-7-氯-6-(吡咯烷-1-基)喹诺酮12b表现出强的抗菌活性,对肝细胞的细胞毒性低,对DNA促旋酶的抑制力强,以及广泛的抗菌谱,包括抗多药耐药菌株。该活性分子12b还比诺氟沙星诱导细菌耐药性的速度更慢。对结构-活性关系(SARs)的分析表明,喹诺酮3-位的2-氨基噻唑片段在发挥抗菌活性方面起着重要作用。氨基噻唑喹诺酮12b与敏感的耐甲氧西林金黄色葡萄球菌(MRSA)菌株的DNA的分子建模和实验研究表明,可能的抗菌机制可能与化合物12b –Cu 2+ –DNA三元复合物的形成有关,其中Cu 2+离子充当3-氨基噻唑喹诺酮骨架与核酸磷酸基团之间的桥梁。