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 Strecker reaction 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
已经开发了用于合成3-氨基-3-氰基氧新吲哚的有机催化对映选择性Strecker反应。使用奎宁衍生的硫脲催化剂,将三甲基甲硅烷基氰化物亲核加成到N -Boc-酮亚胺中,可以得到3-氨基-3-canooxindoles,产率高至优异(78-98%),对映选择性也很好(高达94%)。此外,据我们所知,该方法还代表了第一个对映选择性有机催化的Strecker反应,其中N -Boc-酮亚胺为亲电试剂。