The Quinine Thiourea-Catalyzed Asymmetric Strecker Reaction: An Approach for the Synthesis of 3-Aminooxindoles
作者:Dong Wang、Jinyan Liang、Jingchao Feng、Kairong Wang、Quantao Sun、Long Zhao、Dan Li、Wenjin Yan、Rui Wang
DOI:10.1002/adsc.201200630
日期:2013.1.9
An organocatalytic enantioselective Streckerreaction for the synthesis of 3-amino-3-cyanooxindoles has been developed. Employing a quinine-derived thiourea catalyst, the nucleophilic addition of trimethylsilyl cyanide to N-Boc-ketimines affords 3-amino-3-canooxindoles in good to excellent yields (78–98%) and very good enantioselectivities (up to 94%). Furthermore, to the best of our knowledge, this