Synthesis and antituberculosis activity of novel mefloquine-isoxazole carboxylic esters as prodrugs
作者:Jialin Mao、Hai Yuan、Yuehong Wang、Baojie Wan、Dennis Pak、Rong He、Scott G. Franzblau
DOI:10.1016/j.bmcl.2009.11.105
日期:2010.2
of the corresponding acid (compound 4) at pH 6.0 suggested that it may be active in vivo in an acidic environment produced as a consequence of inflammation in the lungs of TB patients. The fact that various ester bioisosteres of compound 3 lost anti-TB activity further suggested that the ester compound 3 may function as a prodrug. The detailed structure–activity relationships (SARs) from this study
据报道,5-(2,8-双(三氟甲基)喹啉-4-基氧基甲基)异恶唑-3-羧酸乙酯(化合物3)对复制型和非复制型结核分枝杆菌均具有优异的抗结核活性,且抑制最小浓度(MIC)分别为0.9μM和12.2μM。在这项研究中,进一步研究了化合物3的抗结核活性。它的活性似乎对结核分枝杆菌复合物的生物非常有特异性,并以4.1μM的EC 90显着降低了感染巨噬细胞中细菌的数量。更重要的是,相应酸的体外抗结核活性增加(化合物4)在pH 6.0时提示它可能在由结核病患者的肺部炎症引起的酸性环境中具有体内活性。化合物3的各种酯生物等排体失去抗TB活性的事实进一步表明,酯化合物3可以起前药的作用。这项研究的详细的结构-活性关系(SAR)应该有助于我们提高该异恶唑酯系列抗TB药效的最终目标。