Antibacterial performance of heterocyclic organobismuth (III) complexes based on bidentate C,O‐coordinating ligands: Synergism of ligand identity and coordination number
作者:Wei Li、Yan Huang、Yongping Liu、Zixiu Wang、Shan Li、Yi Chen、Yifei Ye、Shuang‐Feng Yin、Jian Lei
DOI:10.1002/aoc.7141
日期:2023.8
A series of heterocyclic organobismuth (III) complexes based on bidentate C,O-coordinating ligands were designed and synthesized as antimicrobials. Antibacterial assays showed that complexes of this type are more effective for Gram-positive bacteria (Staphylococcus aureus, Staphylococcus epidermidis, and Enterococcus faecalis) than Gram-negative ones (Escherichia coli and Pseudomonas aeruginosa). Their
设计并合成了一系列基于双齿C,O-配位配体的杂环有机铋(III)配合物作为抗菌剂。抗菌试验表明,这种类型的复合物对革兰氏阳性菌(金黄色葡萄球菌、表皮葡萄球菌和粪肠球菌)比革兰氏阴性菌(大肠杆菌和铜绿假单胞菌)更有效。它们的活性与亲脂性、几何形状和稳定性的协同作用特别相关,这取决于配位配体的身份和铋中心的配位数。相比之下,高价 14-Bi-6 物质二芳基硝酸铋 ( 8)被发现表现出最有效的抑制作用以及高度的选择性,其 IC 50 (LO2)/MIC(金黄色葡萄球菌)比率高达 23.08。时间杀灭分析表明,复合物8在低浓度下具有抑菌作用,而在高剂量下则表现出显着的杀菌活性。耐药性实验结果表明,复合物8可以抑制细菌生物膜的形成,从而延缓或阻止耐药性的发展。此外,复合物8对多种耐药金黄色葡萄球菌也表现出较高的抑制效率。,MIC值在0.39-1.56 μM范围内,表明该有机金属化合物与常用抗生素之间不存在交叉耐药性。