Synthesis and biological activities of novel 5-substituted-1,3,4-oxadiazole Mannich bases and bis-Mannich bases as ketol-acid reductoisomerase inhibitors
作者:Yan Zhang、Xing-Hai Liu、Yi-Zhou Zhan、Li-Yuan Zhang、Zheng-Ming Li、Yong-Hong Li、Xiao Zhang、Bao-Lei Wang
DOI:10.1016/j.bmcl.2016.08.059
日期:2016.10
A series of novel 5-substituted-1,3,4-oxadiazole Mannich bases and bis-Mannich bases have been conveniently synthesized in good yields. Their structures were characterized by IR, (1)H NMR, (13)C NMR and elemental analysis. The preliminary bioassay results indicated that some of the compounds showed promising in vitro fungicidal activities towards several test plant fungi; some of them exhibited significant
方便地以高收率方便地合成了一系列新颖的5-取代的1,3,4-恶二唑曼尼希碱和双曼尼希碱。通过IR,(1)H NMR,(13)C NMR和元素分析对它们的结构进行表征。初步的生物测定结果表明,某些化合物对几种试验植物真菌显示出良好的体外杀真菌活性。其中一些对甘蓝型油菜表现出显着的除草活性,对水稻酮醇-酸还原异构酶(KARI)的体外抑制活性极好。在14种新化合物中,8c,8d和8m显示出有效的KARI抑制活性,Ki值分别为(0.96±0.42),(3.86±0.49)和(3.10±0.71)μmol/ L,与IpOHA相当。这些化合物可能是新型的KARI抑制剂,需要进一步研究。