Copper(I)-Catalyzed A<sup>3</sup>-Coupling Based Reaction of Alkynes, Aldehydes, and Amines: An Efficient Approach to 2,5-Polysubstituted Dihydrofurans and 2,5-Disubstituted Furans
作者:Wu Fan、Shengming Ma
DOI:10.1002/ejoc.201500209
日期:2015.6
An efficient and practical A3-couplingbasedreaction that gives a variety of 2,5-polysubstituteddihydrofurans and 2,5-disubstitutedfuran derivatives has been developed. This domino copper-catalyzed three-component coupling reaction of propargylic alcohol, ethyl glyoxalate, and an amine affords a propargylic amine intermediate, which undergoes an alkyne–allene isomerization followed by a cyclization