Synthesis of
<i>E</i>
/
<i>Z N</i>
‐(1‐Chlorovinyl)formamide Using Vilsmeier–Haack Reaction
作者:Linlin Tang、Jingtao Wang、Xiaojiao Xia、Hua Zuo、Kyung‐Min Choi、Dong‐Soo Shin
DOI:10.1002/bkcs.11673
日期:2019.3
Synthesis of a variety of novel Z/E N‐(1‐chlorovinyl)formamides through Vilsmeier–Haack reaction starting from 2‐phenoxyethanamides with POCl3/DMF has been accomplished. The reactions introduced chlorine atom to the Cα‐position and phenoxy substitutions to the Cβ‐position of N‐vinylformamides, and the Z/E isomers of N‐(1‐chlorovinyl)formamide were isolated and characterized. In most cases, Z/E N‐(
从2-苯氧基乙酰胺与POCl 3 / DMF开始的Vilsmeier-Haack反应已完成了多种新型Z / EN-(1-氯乙烯基)甲酰胺的合成。该反应引入了氯原子的C α位和苯氧基取代的C β的位上的N- vinylformamides,和Z / E异构体的N-(1-氯乙烯基)甲酰胺的分离和表征。在大多数情况下,都获得了Z / EN-(1-氯乙烯基)甲酰胺。然而,由于位阻原因,从环己胺开始的反应提供了N-(1-氯-2-(2,4-二氯苯氧基)乙烯基)-N-的唯一Z异构体环己基甲酰胺是高度区域选择性的产物。