Asymmetric Intermolecular Rauhut−Currier Reaction for the Construction of 3,3-Disubstituted Oxindoles with Quaternary Stereogenic Centers
作者:Hongyu Wang、Kaiye Wang、Yunquan Man、Xiaonan Gao、Limin Yang、Yanfei Ren、Na Li、Bo Tang、Gang Zhao
DOI:10.1002/adsc.201700649
日期:2017.11.23
remote cross Rauhut−Currier reaction utilizing vinyl ketones and para‐quinone methides derived from isatins was realized, which was successfully catalyzed using bifunctional phosphines, furnishing chiral 3,3‐disubstituted oxindoles in excellent enantioselectivities and high yields. The mechanistic studies demonstrated the key role of the alkyl hydrogen of the vinyl ketones, which conceivably interacted
实现了利用乙烯基酮和衍生自靛红的对苯二甲酰甲烷进行的远程Rauhut-Currier交叉反应,该反应已成功使用双官能膦催化,以优异的对映选择性和高收率提供了手性3,3-二取代的羟吲哚。机理研究证明了乙烯基酮的烷基氢的关键作用,可以想象它通过氢键与对苯二甲酰甲基羰基通过氢键相互作用,为新型不对称反应的设计提供了新的见识。