Journal of the American Chemical Society, Vol.133, No.15, 5672-5675, 2011
Copper-Catalyzed gamma-Selective and Stereospecific Allylic Alkylation of Ketene Silyl Acetals
Copper-catalyzed allylic alkylation of ketene silyl acetals proceeded with excellent gamma-E-selectivity. Efficient alpha-to-gamma chirality transfer with anti-selectivity occurred in the reaction of enantioenriched secondary allylic phosphates, affording enantioenriched beta-branched gamma,delta-unsaturated esters. Excellent functional group compatibility was observed.