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 stereoselectivity 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 C–H borylation reaction proceeds via Pd­(IV) pincer complex intermediates.