Palladium-Catalyzed Oxidative Borylation of Allylic C-H Bonds in Alkenes

This communication describes an efficient palladium pincer complex-catalyzed allylic C-H borylation of alkenes. The transformation exhibits high regio- and stereo selectivity with a variety of linear alkenes. A synthetically useful feature of this allylic C-H borylation method is that all allyl-Bpin products can be isolated in usually high yields. Preliminary mechanistic studies indicate that this CH borylation reaction proceeds via Pd(IV) pincer complex intermediates.