Reactions of azo and azoxy sulphones with transition metal complexes. Part 7. Arylation of olefins with arylazoxy aryl sulphones catalysed by a palladium(0) phosphine complex

Abstract

The arylation of acyclic and cyclic olefins by arylazoxy aryl sulphones has been investigated in the presence of a palladium(0) catalyst in benzene. Both of the aryl groups of the arylazoxy aryl sulphones are found to participate in the arylation. Two equivalents of aryl-substituted olefins were obtained when the reactions were carried out at 80 °C, whereas one equivalent of olefin was arylated at 120 °C. A plausible catalytic cycle involving a diarylpalladium(II) species is proposed.