Arene CH=O hydrogen bonding : a stereocontrolling tool in palladium-catalyzed arylation and vinylation of ketones

). However, no product wasformed in the presence of LiOAc. With CsF, arylationoccurred, but the product racemized. To our delight, wefinally found that the tin enolate of 1-tetralone can couplevery efficiently with 91% ee when L1 was used. No erosion ofthe ee value was observed over time. The tin enolate wasformed easily by stirring alkenyl acetate with nBu