Syntheses of epoxides, and structural analysis of (E)N-hexyl-3-(trans-3-methyloxiran-2-yl)prop-2-enamide by spectroscopic techniques and DFT calculations
作者:Alex R. Aguiar、Elson S. Alvarenga、Ramon P. Oliveira、Vania Maria T. Carneiro、Luciano G. Moura
DOI:10.1016/j.molstruc.2018.04.013
日期:2018.8
13.37 kJ mol −1 . Experimental and calculated nuclear magnetic resonance chemical shifts were compared for both candidate epoxides ( 2g and 2g′ ), and a better match was achieved for the title compound ( 2g ). The complementarity of Raman and infrared (IR) spectroscopies is a feature that can be explored for the characterization of this class of compound. This is shown by the bands around 3092 cm −1
摘要 拟除虫菊酯是一种三元环化合物,类似于菊花和黄菊花的花产生的天然除虫菊酯。拟除虫菊酯是杀虫剂,也可能具有驱虫特性,通常对人类无害。由于我们对具有杀虫活性的化合物的兴趣,我们合成了七种环氧化物 (2a-g),它们在结构上与拟除虫菊酯相似。环氧化物是通过七种二酰胺(1a-g)与间氯过苯甲酸的立体有择和区域选择性环氧化制备的。计算了两种可达到的环氧化物( 2g 和 2g' )在各自平衡几何形状下的能量,我们已经表明标题环氧化物( 2g )比候选环氧化物( 2g' )(反式)N-己基-3更稳定-((E)-prop-1-en-1-yl)oxirane-2-carboxamide 13。37 kJ 摩尔 -1 。对两种候选环氧化物(2g 和 2g')的实验和计算的核磁共振化学位移进行了比较,并且标题化合物(2g)实现了更好的匹配。拉曼光谱和红外 (IR) 光谱的互补性是可用于表征此类化合物的一个特征。这由拉曼中