Fast, solvent-free, highly enantioselective three-component coupling of aldehydes, alkynes, and amines catalysed by the copper(ii)pybox complex under high-vibration ball-milling
Enantioselective One-Pot Three-Component Synthesis of Propargylamines
作者:Alakesh Bisai、Vinod K. Singh
DOI:10.1021/ol060793f
日期:2006.5.1
[reaction: see text] A copper(I) complex of i-Pr-pybox-diPh has been found to be an efficient catalyst for an enantioselective one-pot three-componentsynthesis of propargylamines from aldehydes, amines, and alkynes. The reaction has been applied to a wide variety of aromatic aldehydes with excellent yields (up to 99%) and enantiomeric excesses (up to 99% ee). A transition-state model has been proposed
Fast, solvent-free, highly enantioselective three-component coupling of aldehydes, alkynes, and amines catalysed by the copper(<scp>ii</scp>)pybox complex under high-vibration ball-milling
作者:Zhenhua Li、Zhijiang Jiang、Weike Su
DOI:10.1039/c5gc00079c
日期:——
Chiral propargylamines were prepared by a ball-milling promoted, fast, high yielding, and highly enantioselective solvent-free A3 reaction using a reusable catalyst.
Utilization of CO<sub>2</sub> as a C1 Building Block in a Tandem Asymmetric A<sup>3</sup> Coupling-Carboxylative Cyclization Sequence to 2-Oxazolidinones
We report a tandem asymmetric aldehyde–alkyne–amine (A3) coupling-carboxylative cyclization sequence for the highly enantioselective synthesis of chiral N-aryl 2-oxazolidinones. This is a rare example of a multicatalyst-promoted asymmetric tandem reaction using CO2 as a C1 synthon. Notably, the copper species and ligand from the upstream A3 reaction are internally reused to facilitate the downstream