Palladium-Catalyzed Allylation Reaction of Alkynylborates

Abstract Alkynyl(aryl)(diorganyl)borates, anionic tetrahedral boron compounds, reacted with allylic bromides in the presence of a palladium(0) catalyst to produce (diorganyl)(trisubstituted alkenyl)boranes. Allylation took place at the alkynyl carbon β to boron, inducing 1,2-migration of the aryl group on the anionic boron center to the α-carbon.