Synthesis, biological activities and SAR studies of new 3-substitutedphenyl-4-substitutedbenzylideneamino-1,2,4-triazole Mannich bases and bis-Mannich bases as ketol-acid reductoisomerase inhibitors
作者:Bao-Lei Wang、Li-Yuan Zhang、Xing-Hai Liu、Yi Ma、Yan Zhang、Zheng-Ming Li、Xiao Zhang
DOI:10.1016/j.bmcl.2017.10.065
日期:2017.12
A series of new 3-substitutedphenyl-4-substitutedbenzylideneamino-1,2,4-triazole Mannich bases and bis-Mannich bases were synthesized through Mannich reaction with high yields. Their structures were confirmed by means of IR, 1H NMR, 13C NMR and elemental analysis. The preliminary bioassay indicated that compounds 7g, 7h and 7l exhibited potent in vitro inhibitory activities against ketol-acid reductoisomerase
通过Mannich反应合成了一系列新的3-取代苯基-4-取代的亚苄基氨基-1,2,4-三唑曼尼希碱和双曼尼希碱。通过IR,1 H NMR,13 C NMR和元素分析证实了它们的结构。初步的生物测定结果表明,化合物7g,7h和7l对K i的酮醇酸还原异构酶(KARI)表现出有效的体外抑制活性。值分别为(0.38±0.25),(6.59±2.75)和(8.46±3.99)μmol/ L,与IpOHA相当。它们可能是用于后续研究的新型KARI抑制剂。一些标题化合物还表现出对明显的除草活性稗草和显着的体外杀真菌活性针对轮纹轮纹病菌和纹枯病菌。分析了化合物的SAR,其中分子对接揭示了7g与KARI的结合模式,并且3D-QSAR结果为指导进一步优化这种结构以发现针对谷物纹枯病的新型杀真菌剂提供了有用的信息。