Consecutive Intramolecular Hydroamination/Asymmetric Transfer Hydrogenation under Relay Catalysis of an Achiral Gold Complex/Chiral Brønsted Acid Binary System
作者:Zhi-Yong Han、Han Xiao、Xiao-Hua Chen、Liu-Zhu Gong
DOI:10.1021/ja903547q
日期:2009.7.8
Consecutive hydroamination/asymmetrictransferhydrogenation under relay catalysis of an achiral gold complex/chiral Brønsted acid binary system has been described for the direct transformation of 2-(2-propynyl)aniline derivatives into tetrahydroquinolines with high enantiomeric purity.
Chiral Gold Phosphate Catalyzed Tandem Hydroamination/Asymmetric Transfer Hydrogenation Enables Access to Chiral Tetrahydroquinolines
作者:Yu-Liu Du、Yue Hu、Yi-Fan Zhu、Xi-Feng Tu、Zhi-Yong Han、Liu-Zhu Gong
DOI:10.1021/acs.joc.5b00153
日期:2015.5.1
A highly efficient chiral gold phosphate-catalyzed tandem hydroamination/asymmetric transfer hydrogenation reaction is described. A series of chiral tetrahydroquinolines were obtained in excellent yields and enantioselectivities. In this reaction, the gold catalyst enables both the hydroamination step as a pi-Lewis acid and the asymmetric hydrogen-transfer process as an effective chiral Lewis acid.