Highly Enantioselective Michael Addition of 3-Aryloxindoles to Phenyl Vinyl Sulfone Catalyzed by Cinchona Alkaloid-Derived Bifunctional Amine-Thiourea Catalysts Bearing Sulfonamide as Multiple Hydrogen-Bonding Donors
作者:Mei-Xin Zhao、Wen-Hao Tang、Ming-Xiao Chen、Deng-Ke Wei、Tong-Lei Dai、Min Shi
DOI:10.1002/ejoc.201100791
日期:2011.10
A highlyenantioselectiveMichaeladdition of 3-aryloxindole to phenylvinylsulfonecatalyzed by a quinine-derived bifunctional amine–thiourea-bearing sulfonamide as multiplehydrogen-bondingdonorcatalyst has been investigated. The corresponding adducts, which contain a chiral quaternary carbon center at the 3-position of the oxindole, were obtained in moderate-to-good yields (52–86 %) with high-to-excellent