摘要

A protocol for palladium-catalyzed ortho C(sp(2))-H alkenylation via a rarely reported seven-membered palladacycle with oxalyl amide as a directing group was reported. The range of olefins was the broadest yet reported for this kind of C-H alkenylation reaction. For example, allyl acetate, allyl alcohol derivatives, acraldehyde, acrylate and acrylonitrile were all tolerated in this C-H transformation. Sequential alkenylation reactions were also achieved to construct the complex olefinated arenes in good yields in one pot.