Synthesis, evaluation of insecticidal activity, and crystal analysis of cis-nitenpyram analogs bearing 1,4-dihydropyridine
作者:Chuanwen Sun、Tianyan Liu、Li Ding、Yanxia Chen、Wanggeng Zhang
DOI:10.1007/s00706-012-0872-8
日期:2013.7
AbstractA new series of nitenpyram analogs were designed by introducing 1,4-dihydropyridine to fix the pharmacophore (–C=C–NO2) into the cis-configuration, as confirmed by X-ray diffraction. Crystal structure analysis showed that there was a homoconjugation effect on these cis-nitenpyram analogs, and a huge conjugated system comprising the 1,4-dihydropyridine scaffold and the ester group at the 3 position
摘要X射线衍射证实,通过引入1,4-二氢吡啶将药效团(–C = C–NO 2)固定为顺式构型,设计了一系列新的乙炔吡喃类似物。晶体结构分析表明,对这些顺式-硝苯并吡喃类似物具有均共轭作用,巨大的共轭体系由1,4-二氢吡啶骨架和3位的酯基组成。初步生物测定表明,大部分目标化合物中的100毫克/分米显示出良好的杀虫活性(> 80%)3对棉蚜medicagini,而4-氟苯顺以20mg -nitenpyram模拟得到最好的活性,> 90%的死亡率/ dm 3。这些出色的杀虫活性表明,这种巨大的共轭体系导致分子与受体中氨基酸残基之间增强的π-π相互作用。对这些顺式-硝苯并吡喃类似物之一的作用方式和结构修饰的进一步研究正在进行中。 图形概要 。