Asymmetric Catalytic Double Michael Additions for the Synthesis of Spirooxindoles
作者:Tengfei Kang、Peng Zhao、Jian Yang、Lili Lin、Xiaoming Feng、Xiaohua Liu
DOI:10.1002/chem.201800043
日期:2018.3.12
Asymmetric cascade double Michael additions to construct 2′‐substituted 3,3′‐spirooxindoles by using a chiral guanidine organocatalyst has been developed. A series of spirooxindole derivatives containing dihydrofuran or pyrrolidine subunits were obtained with good to excellent diastereo‐ and enantioselectivities. The method showed great tolerance of a number of aromatic and aliphatic alkynones. The