Heck reactions catalyzed by oxide-supported palladium -: structure-activity relationships

The catalytic activity and selectivity of palladium supported on various metal oxides in carbon-carbon coupling reactions of aryl bromides with styrene (Heck reaction) were investigated. The activity is determined by the nature of the oxide support and the Pd dispersion (structure-activity relationships). The relation of homogeneous (leaching) and heterogeneous mechanisms is discussed.