Copper‐Catalyzed Arylation of Remote C(sp3)−H Bonds in Carboxamides and Sulfonamides

)-H arylated carboxamides and sulfonamides, respectively, in good to high yields. Mechanistic studies indicate that the reaction might proceed through an amidyl radical generation, 1,5-hydrogen atom transfer (HAT), and copper-catalyzed cross-coupling of the resulting carbon radical with arylboronic acids.