Highly Enantioselective Ketone-Ene Reactions of Trifluoropyruvate: Significant Counterion Effect of the In(III)−PyBox Complex
作者:Jun-Feng Zhao、Teguh-Budiono W. Tjan、Boon-Hong Tan、Teck-Peng Loh
DOI:10.1021/ol902507x
日期:2009.12.17
A chiral indium(III)-pybox complex catalyzed asymmetric ketone-ene reaction of trifluoropyruvate is described. Both aromatic and aliphatic 1,1-disubstituted alkenes reacted smoothly to give the enantioenriched tertiary homoallylic alcohols in good to excellent yields (up to 99%) and with excellent enantioselectivities (up to 98% ee).