A bottleable super-electron-donor for catalytic borylation of aryl halides

Abstract

[(Dpp-bian)B(DMAP)]₂ (dpp-bian = 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene, DMAP = 4-(dimethylamino)pyridine), a bottleable super electron donor (SED), was demonstrated to serve as a SED catalyst in the borylation of aryl iodides, bromides, and the more challenging chlorides. Apart from installing Bpin from B₂pin₂, the SED-catalyzed borylation protocol is also applicable for installing Bdan from Bpin–Bdan. The radical mechanism has been confirmed by the radical trapping and radical clock experiments.