The aromatic substitution of olefins via arylpalladium species has been extensively studied during the past dec- ade.' These reactions have been carried out in the presence of either a stoichiometric or catalytic amount of palladium compounds, and the need for utilizing these reactions as an efficient synthetic tool has increased the significance of this area of organometallic chemistry. In both the stoichiometiric and catalytic arylations of olefins by way of ...