Cu-Catalyzed asymmetric Friedel–Crafts propargylic alkylation of phenol derivatives
作者:Long Shao、Xiang-Ping Hu
DOI:10.1039/c7ob02133j
日期:——
A copper-catalyzed asymmetric Friedel–Crafts propargylic alkylation of electron-rich phenol derivatives with a variety of propargylic esters has been described. With Cu(OTf)2 decorated with a chiral tridentate ketimine P,N,N-ligand as the catalyst, asymmetric Friedel–Crafts propargylic alkylation of 3,5-dialkoxyphenol derivatives proceeded smoothly in high yields and with good to excellent enantioselectivities
An efficient asymmetric aza-Friedel–Crafts reaction of phenols with isatin-derived ketimines is described. The reaction, which was promoted by a Bi(OH)3/CPA system, gave a series of chiral 3-amino-2-oxindoles with high yields (up to 99%), excellent enantioselectivities (up to 99%) and moderate to very good regioselectivities (up to 25/1).