Synthesis, Insecticidal Activity, Crystal Structure, and Molecular Docking Studies of Nitenpyram Analogues with an ω-Hydroxyalkyl Ester Arm Anchored on the Tetrahydropyrimidine Ring
作者:Chuan-Wen Sun、Ting Fang、Jing Wang、Zhi-bing Hao、Shi-bing Nan
DOI:10.1021/jf3024479
日期:2012.9.26
action between neonicotinoids and insect nicotinic acetylcholine receptor (nAChR), a new series of nitenpyram analogues with an ω-hydroxyalkyl ester arm anchored on the tetrahydropyrimidine ring was designed and synthesized to further enhance the strength of the hydrogen-bonding action they display in binding with the nAChR. The structures of the target compounds were characterized by 1H NMR, IR, and
在对新烟碱类和昆虫烟碱型乙酰胆碱受体(nAChR)之间拟议的作用方式进行研究的基础上,设计并合成了一系列新的尼藤嘧啶类似物,该化合物具有固定在四氢嘧啶环上的ω-羟烷基酯臂。它们显示出与nAChR结合的氢键作用。通过1 H NMR,IR和元素分析对目标化合物的结构进行表征,并通过X射线衍射确认其顺式构型。初步的生物分析表明,所有的烯啶虫胺类似物在100 mg / L时均对褐飞虱和桃蚜有良好的杀虫活性,而类似物4d和图6a,得到在有以4mg / L≥95%的死亡率体外活性最好的; 类似物4d和6a的LC 50值分别为0.170和0.154 mg / L。结构-活性关系(SAR)研究表明,它们的杀虫力也受分子的柔韧性和大小双重控制。此外,分子对接模拟显示类似物4d和6a在与nAChR结合时显示出更强的氢键作用,这解释了在体外观察到的SAR,并暗示设计的乙炔吡喃类似物既实用又可行。