Highly Enantioselective Michael Addition Reactions of 3-Substituted Benzofuran-2(3H)-ones to Chalcones Catalyzed by a Chiral Alkyl-Substituted Thiourea
作者:Xin Li、Zhiguo Xi、Sanzhong Luo、Jin-Pei Cheng
DOI:10.1002/adsc.201000106
日期:——
A highly enantioselective Michael addition of 3‐substituted benzofuran‐2(3H)‐ones to chalcones catalyzed by a chiral bifunctional thiourea was developed. Several chiral 3,3′‐substituted benzofuran‐2(3H)‐ones derivatives, bearing adjacent quaternary‐tertiary stereocenters, were efficiently synthesized with excellent enantioselectivities.
有人开发了手性双官能硫脲催化的三取代苯并呋喃-2(3 H)-酮对映体的高对映选择性。几个具有相邻的季-叔立体中心的手性3,3'-取代的苯并呋喃-2(3 H)-one衍生物被有效地合成,具有出色的对映选择性。