Facile synthesis of novel Mono- and Bis-<i>N</i>-sulfamoylamidines
作者:Ye Xuan-Wu、Abudureheman Wusiman
DOI:10.1080/10426507.2019.1653870
日期:2020.2.1
Abstract Mono- and bis-N-sulfamoylamidines have been efficiently synthesized by the direct condensation of sulfamides and amides in the presence of phosphorus oxychloride via electrophilic activation. The scope of this reaction is discussed, and detailed synthetic studies show that the desired products are generated in high yields under mild conditions. Graphical Abstract
chemoselective and allows for a wide variety of functional groups such as esters, ketones, aldehydes, and imines to be tolerated. Furthermore, a modification of this one-pot procedure gives access to the corresponding triazoles. The chemically stable amide functionality is demonstrated to be an efficient synthetic handle for the formation of highly substituted triazolines or triazoles.
Direct use of dioxygen as an oxygen source: catalytic oxidative synthesis of amides
作者:Wei Wei、Xiao-Yu Hu、Xiao-Wei Yan、Qiang Zhang、Ming Cheng、Jian-Xin Ji
DOI:10.1039/c1cc14640h
日期:——
The first transition-metal-catalyzed directoxidative synthesis of amides by usingdioxygen as an oxygen source has been developed under mild conditions, in which DBU was used as the key additive. The present methodology, which utilizes dioxygen as an oxidant and oxygen source and cheap copper salts as catalysts, opens up an interesting and attractive avenue for the synthesis of amide functionality
Catalyst-free amidation of aldehyde with amine under mild conditions
作者:Hongyin Yang、Wenjian Hu、Shengjue Deng、Tiantian Wu、Haiman Cen、Yiping Chen、Dela Zhang、Bo Wang
DOI:10.1039/c5nj01372k
日期:——
A highly efficient, catalyst-free and one-pot procedure for the direct synthesis of amides from aldehydes and amines under mild conditions has been developed.
一种高效、无催化剂且一锅法的程序已经开发出来,可在温和条件下直接合成酰胺,使用的原料是醛和胺。
An Efficient One-pot Procedure for the Direct Preparation of 4,5-Dihydroisoxazoles from Amides
reductive functionalization of amides to afford 5‐amino substituted 4,5‐dihydroisoxazoles is presented. The reduction of amides generates reactive enamines, which upon the addition of hydroximinoyl chlorides and base undergoes a 1,3‐dipolar cycloaddition reaction that gives access to the desired heterocyclic compounds. The transformation of amides is highly chemoselective and tolerates functional groups