A simple, efficient and highly functional group compatible method for the synthesis of propargylamines from terminal alkynes, dichloromethane and tertiary amines using silver catalysts has been developed.
开发了一种简单、高效且功能性强的群兼容方法,用于以银催化剂从末端炔烃、二氯甲烷和叔胺合成炔丙胺。
Glyoxylic Acid: A Carboxyl Group‐Assisted Metal‐Free Decarboxylative Reaction Toward Propargylamines
A versatile metal‐free decarboxylative reaction of glyoxylicacid monohydrate with secondary amines and alkynes to produce propargylamines has been developed. In this reaction, the carboxyl group of glyoxylicacid can enhance the activation of the alkynes to react with iminium ion intermediate without any catalysts, thus increasing the sustainability of the process.
Catalytic Methylene Insertion between Amines and Terminal Alkynes via C–N Bond Cleavage of <i>N</i>,<i>N</i>-Dimethylacetamide: A Unique Route to Propargylic Amines
A copper-based system allows for the methylene insertion between an amine and a milder nucleophile, including a terminalalkyne counterpart, via C–N bond cleavage of N,N-dimethylacetamide. The method gives an expedient access to propargylic amines in good to excellent yields. A wide-ranging substrate scope and late-stage functionalization of complex molecules make the protocol practically valuable
Metal-Free Decarboxylative Three-Component Coupling Reaction for the Synthesis of Propargylamines
作者:Kyungho Park、Yumi Heo、Sunwoo Lee
DOI:10.1021/ol401358t
日期:2013.7.5
A metal-free decarboxylative three-component coupling reaction was developed. When alkynyl carboxylic acids, paraformaldehyde, and amines were reacted in CH3CN at 65 degrees C for 3 h, the desired propargylamines were obtained in good yields. This coupling reaction also showed good yield in water solvent. This reaction showed higher selectivity toward alkynyl carboxylic acids than a terminal alkyne.
Continuous flow reactions in water for the synthesis of propargylamines via a metal-free decarboxylative coupling reaction
作者:Bongkyun Jung、Kyungho Park、Kwang Ho Song、Sunwoo Lee
DOI:10.1016/j.tetlet.2015.06.029
日期:2015.8
A range of propargylamines was synthesized via the metal-free decarboxylativecoupling of alkynyl carboxylic acids with amines and paraformaldehyde in water, using a continuous flow reaction system. Aryl- and alkyl-substituted propiolicacids were found to react with secondaryamines in the presence of paraformaldehyde, at 140 °C in water to give the desired propargylamines in good yield.