Indium-Catalyzed Highly Efficient Three-Component Coupling of Aldehyde, Alkyne, and Amine via C−H Bond Activation
作者:Yicheng Zhang、Pinhua Li、Min Wang、Lei Wang
DOI:10.1021/jo900507v
日期:2009.6.5
was found to be a highly effective catalyst for the three-componentcoupling reactions of aldehydes, alkynes, and amines (A3-coupling) via C−H activation. The reactions could be applied to both aromatic and aliphatic aldehydes and alkynes. Nearly quantitative yields of the desired products were obtained in most cases. No cocatalyst or activator is required, and water is the only byproduct in the reactions
Indium-Catalysed Multicomponent Reaction of Acetals with Dibenzylamine and Alkynes
作者:Xue-Lin Zhang、Qin-Pei Wu、Qing-Shan Zhang
DOI:10.3184/174751913x13816565482472
日期:2013.11
A reaction of acetals with dibenzylamine and alkynes to form propargylamines has been developed via the activation of both C(sp3)-O and C(sp)-H bonds by InCl3. The iminium ion has been found to be the key intermediate.
Cu0NPs@CMC: an efficient recoverable nanocatalyst for decarboxylative A3 and A3 couplings under neat condition
Copper nanoparticles assembled on carboxymethylcellulose (Cu0NPs@CMC) were successfully synthesized and well characterized by FT-IR, SEM, EDS, TEM, XPS, and ICP-AES. The new prepared nanocatalyst was applied effectively as a heterogeneous catalyst for the synthesis of propargylamines via decarboxylatived A3 and classic A3 reaction under solvent-free condition. A broad spectrum of diversely polysubstituted propargylamines could be obtained in moderate to excellent yields. The present method showed several merits such as easy work-up, short reaction time, additive-free characteristic, solvent-free condition, functional group tolerance, usage of recyclable green and sustainable nanocatalyst.