Base‐Free Palladium‐Catalyzed Borylation of Aryl Chlorides with Diborons

Abstract The base‐free palladium‐catalyzed borylation of aryl chlorides with diborons was achieved. The base‐free conditions offered acceptable functional group compatibility. Based on experimental and computational studies, it was shown that smooth boryl transfer from the diborons to the arylpalladium chloride was promoted by strong interaction between the Lewis acidic boron and the chlorine atom on palladium.