New potent ciprofloxacin-uracil conjugates as DNA gyrase and topoisomerase IV inhibitors against methicillin-resistant Staphylococcus aureus
作者:Mohamed Samir、Mohamed Ramadan、Mostafa H. Abdelrahman、Mohammed A.I. Elbastawesy、Hamada Mohamed Halby、Mohamed Abdel-Aziz、Gamal El-Din A. Abuo-Rahma
DOI:10.1016/j.bmc.2022.117004
日期:2022.11
new derivatives exhibited better activity against Gram-positive than the Gram-negative strains; most of the target compounds exhibited good activities against S. aureus ATCC 6538. Compounds 5b and 5g possess the highest activities with MICs of 1.25 and 2.37 µM, respectively, which are more potent than the parent drug ciprofloxacin, MIC, 7.58 µM. In addition, they also exhibited potent activities against
合成了一系列环丙沙星-尿嘧啶偶联物5a-t,并通过1 H NMR、13 C NMR、质谱和元素分析进行了鉴定。抗菌结果表明,新衍生物对革兰氏阳性菌的活性优于革兰氏阴性菌;大多数目标化合物对金黄色葡萄球菌ATCC 6538表现出良好的活性。化合物5b和5g具有最高的活性,其 MIC 分别为 1.25 和 2.37 µM,比母体药物环丙沙星 MIC 为 7.58 µM 更有效。此外,它们还表现出对MRSA AUMC 261的强效活性MIC 分别为 0.031 和 0.046 µM,高于 MIC 为 0.57 µM 的环丙沙星。 此外,与环丙沙星相比,化合物5b和5g显示出对 DNA 促旋酶 (IC 50 = 1.72 和 5.72 µM) 和拓扑异构酶 IV (4.36 和 7.77 µM) 的有效抑制活性,IC 50值分别为 0.66 和 8.16 µM。分子对接研究表明化合物5b和5g