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 highly enantioselective Michael addition of 3-aryloxindole to phenyl vinyl sulfone catalyzed by a quinine-derived bifunctional amine–thiourea-bearing sulfonamide as multiple hydrogen-bonding donor catalyst 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
已经研究了由奎宁衍生的双官能胺-硫脲磺酰胺作为多氢键供体催化剂催化的 3-芳基羟吲哚与苯基乙烯基砜的高度对映选择性迈克尔加成反应。相应的加合物,在羟吲哚的 3 位含有手性季碳中心,以中等至良好的产率(52-86%)获得,具有高至极好的对映选择性(83-98% ee)。