An exo- and Enantioselective 1,3-Dipolar Cycloaddition of Azomethine Ylides with Alkylidene Malonates Catalyzed by a N,O-Ligand/Cu(OAc)2-Derived Chiral Complex
作者:Ming Wang、Zheng Wang、Yu-Hua Shi、Xiao-Xin Shi、John S. Fossey、Wei-Ping Deng
DOI:10.1002/anie.201007960
日期:2011.5.16
An exo‐lent catalyst: An N,O‐ligand/Cu(OAc)2 derived chiral complex is an excellent catalyst for inducing asymmetry in the catalytic enantioselective 1,3‐dipolar cycloadditions of azomethineylides with various alkylidene malonates. A series of highly functionalized exo‐pyrrolidines were obtained in excellent yields (80–99 %) and enantioselectivities (91–99 % ee; see scheme; M.S.: molecular sieve)