Antimycobacterial activity of novel 1,2,4-oxadiazole-pyranopyridine/chromene hybrids generated by chemoselective 1,3-dipolar cycloadditions of nitrile oxides
作者:Raju Ranjith Kumar、Subbu Perumal、J. Carlos Menéndez、Perumal Yogeeswari、Dharmarajan Sriram
DOI:10.1016/j.bmc.2011.04.033
日期:2011.6
The 1,3-dipolar cycloaddition of nitrile oxides generated in situ from benzohydroximinoyl chloride and triethylamine to 2-aminopyranopyridine-3-carbonitriles and 2-aminochromene-3-carbonitriles occurred chemoselectively furnishing novel 1,2,4-oxadiazole-pyranopyridine/chromene hybrid heterocycles in moderate yields. In vitro screening of these compounds against Mycobacterium tuberculosis H37Rv (MTB)
由苯并氢氧亚甲基氯和三乙胺就地生成的腈的1,3-偶极环加成反应生成2-氨基吡咯并吡啶-3-甲腈和2-氨基氧化烯-3-甲腈的化学选择性提供了新的1,2,4-恶二唑-吡喃吡啶/色烯杂化物中等产量的杂环。这些化合物针对结核分枝杆菌H37Rv(MTB)的体外筛选显示,1,2,4-恶二唑-吡喃并吡啶杂化物相对于1,2,4-恶二唑-色烯杂化物表现出增强的活性。在筛选的化合物中,3- [3-(4-氯苯基)-1,2,4-恶二唑-5-基] -4-(2,4-二氯苯基)-8-[(E)-(2,4 -(二氯苯基)-亚甲基] -6-甲基-5,6,7,8-四氢-4 H-吡喃并[3,2- c] pyridin-2-amine(MIC:0.31μM)的活性是标准抗结核药的1.2倍,15.2倍和24.6倍。分别为异烟肼,环丙沙星和乙胺丁醇。