Synthesis, in Vitro Antimycobacterial and Antibacterial Evaluation of IMB-070593 Derivatives Containing a Substituted Benzyloxime Moiety
作者:Zengquan Wei、Jian Wang、Mingliang Liu、Sujie Li、Lanying Sun、Huiyuan Guo、Bin Wang、Yu Lu
DOI:10.3390/molecules18043872
日期:——
A series of novel IMB-070593 derivatives containing a substituted benzyloxime moiety and displaying a remarkable improvement in lipophilicity were synthesized and evaluated for their in vitro antimycobacterial and antibacterial activity. Our results reveal that the target compounds 19a–m have considerable Gram-positive activity (MIC: <0.008–32 µg/mL), although they are generally less active than the reference drugs against the Gram-negative strains. In particular, compounds 19h, 19j, 19k and 19m show good activity (MICs: <0.008–4 µg/mL) against all of the tested Gram-positive strains, including ciprofloxacin (CPFX)- and/or levofloxacin (LVFX)-resistant MSSA, MRSA and MSSE. Moreover, compound 19l (MIC: 0.125 µg/mL) is found to be 2–4 fold more active than the parent IMB070593, CPFX and LVFX against M. tuberculosis H37Rv ATCC 27294.
合成并评价了一系列含有取代苯甲酰肟基团且脂溶性显著提高的新型IMB-070593衍生物的体外抗分枝杆菌和抗菌活性。我们的结果显示,目标化合物19a–m对革兰氏阳性菌具有相当高的活性(MIC:<0.008–32 µg/mL),尽管它们对革兰氏阴性菌的活性通常低于参考药物。特别是化合物19h、19j、19k和19m对所有测试的革兰氏阳性菌株显示出良好的活性(MICs:<0.008–4 µg/mL),包括对环丙沙星(CPFX)和/或左氧氟沙星(LVFX)耐药的甲氧西林敏感金黄色葡萄球菌(MSSA)、甲氧西林耐药金黄色葡萄球菌(MRSA)和表皮葡萄球菌(MSSE)。此外,化合物19l(MIC:0.125 µg/mL)对抗ATCC 27294的结核杆菌H37Rv的活性是母体化合物IMB070593、环丙沙星和左氧氟沙星的2–4倍。