| abstract |
Vinylically-unsaturated compounds are prepared by reacting a halogenated organic compound with a vinylically-unsaturated precursor compound in the presence of (a) a homogeneous zerovalent palladium catalyst complex, (b) a hydrogen halide acceptor and (c) a diluent, wherein the diluent is water or an aqueous solution containing up to 95 percent by volume of an organic solvent. When the catalyst complex includes an organophosphine or organoarsine ligand, the crude product may be purified by treatment with a peroxide for a time sufficient to oxidize organophosphine or organoarsine impurities present in the mixture. Said purification also can be used when the aqueous diluent is omitted or replaced by an anhydrous diluent. |