The Mizoroki–Heck reaction generally refers to Pd-catalyzed CÀC bond formation between organic (pseudo) halides and olefins. Today, it has become a powerful tool to prepare substituted olefins.[1] A key issue in intermolecular Heck reactions is the control of the site where aryl groups insert into olefins. High regioselectivity can be easily achieved for olefins carrying substituents with a significant electronic difference at the two olefinic sites,[2] such ...