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.
Sulfonatingagents such as trimethylsilyl chlorosulfonate and “dioxane, SO3”, react with silylalkynes (ΣCH2CCSiMe3) in which Σ is a functional group, to yield silylacetylene sulfonates (Σ = OMe, Cl), acetylenic sulfates (Σ = OH, OSiMe3) or SO3 nitrogen adduct (Σ = NR2). Allenoxysilanes Me3Si(Σ1)CCC(Σ2)OSiMe3 yield either allenic sulfate (Σ1 = Me3Si, Σ2 = t-Bu) or silyl ketonic sulfonate (Σ1 = n-Bu
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