Chelation-controlled, palladium-catalyzed arylation of enol ethers with aryl triflates. Ligand control of selection for α-or β-arylation of [2-(dimethylamino)ethoxy]ethene.
Palladium-catalyzed arylation reactions of [2-(Dimethylamino)ethoxy]ethene (1) with a series of aryl triflates were performed under a variety of reaction conditions. In particular, the influence of phosphine ligands and halide additives on regioselectivity were studied. It was found that the chelation-controlled arylation of 1 affords an expedient route for the conversion of phenols into arylacetaldehydes