Highly enantioselective Michael addition reactions of 2-substituted benzofuran-3(2H)-ones to nitroolefins
作者:Zhi-Pei Zhang、Nan Dong、Xin Li、Jin-Pei Cheng
DOI:10.1039/c5ob01691f
日期:——
A highly enantioselective Michaeladdition reaction of 2-substituted benzofuran-3(2H)-ones to nitroolefins was promoted by a bifunctional squaramide catalyst. As a result, a number of chiral 2,2′-substituted benzofuran-3-one derivatives, bearing adjacent quaternary–tertiary stereocenters, were efficiently synthesized with excellent enantioselectivities.