Synthesis, bioactivity, theoretical and molecular docking study of 1-cyano-N-substituted-cyclopropanecarboxamide as ketol-acid reductoisomerase inhibitor
作者:Xing-Hai Liu、Pei-Quan Chen、Bao-Lei Wang、Yong-Hong Li、Su-Hua Wang、Zheng-Ming Li
DOI:10.1016/j.bmcl.2007.04.003
日期:2007.7
biosynthesis. The catalyzed process consists of two stages, the first of which is an alkyl migration from one carbon atom to its neighbouring atom. The likely transition state is a cyclopropane derivative, thus a series of new cyclopropane derivatives, such as 1-cyano-N-substituted-cyclopropanecarboxamide, were designed and synthesized. Their structures were verified by (1)H NMR, FTIR spectrum, MS and elemental
酮酸还原异构酶(KARI; EC 1.1.1.86)催化了支链氨基酸生物合成中的第二个常见步骤。催化过程包括两个阶段,第一阶段是烷基从一个碳原子迁移到其相邻原子。可能的过渡态是环丙烷衍生物,因此设计并合成了一系列新的环丙烷衍生物,例如1-氰基-N-取代的环丙烷甲酰胺。通过(1)NMR,FTIR光谱,MS和元素分析验证了它们的结构。活性化合物2、4b对水稻KARI的K(i)值分别为95.30 +/- 13.71、207.9 +/- 21.99 microM。还确定了化合物4a的X射线晶体结构。Auto-Dock用于预测4a的结合模式。这是通过分析化合物4a与菠菜KARI活性位点的相互作用来完成的。该结果与前沿分子轨道理论分析的结果相符。