Efficient One-Pot Synthesis of Propargylamines from Mannich Bases through a Retro-Mannich-Type Fragmentation
摘要:
An efficient one-pot synthesis of propargylamines is achieved by copper-catalyzed coupling of phenylacetylenes with Mannich bases through a chlorine(1+) or bromine(1+) ion-initiated retro-Mannich-type fragmentation under mild conditions. The Mannich bases are easily prepared from an electron-rich phenol, formaldehyde, and an amine. The protocol provides an appealing alternative for the construction of propargylamines by a simple one-pot procedure.
Microwave-assisted copper(I) catalyzed A3-coupling reaction: Reactivity, substrate scope and the structural characterization of two coupling products
作者:Vitthalrao S. Kashid、Maravanji S. Balakrishna
DOI:10.1016/j.catcom.2017.09.020
日期:2018.1
of highly efficientcatalyst [Cu(μ − I)2Cu}(PPh3)4] for the synthesis of biologically and pharmaceutically important propargylamine derivatives through microwave assisted A3-coupling reaction is described. The A3-coupling reaction performed under microwave conditions with a catalyst loading of 0.1 mol% produced propargylamines in almost quantitative isolated yields. Most of the reactions were completed