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.
An enantioselective three‐component reaction of aldehydes, amines, and alkynes in water by using a bis(imidazoline)–CuI catalysts having a hydrophobic substituent and sodium dodecyl sulfate as a surfactant was developed. The reaction was applied to a broad range of aldehydes and alkynes to give opticallyactivepropargylamines with excellent yields (up to 99 %) and enantiomeric excesses (up to 99 % ee)