α-Functionalization of ethers with acridanes and amines via metal-free direct C(sp 3 )–H radical–radical cross-dehydrogenative coupling

A metal-free radical–radical cross-dehydrogenative coupling of the relatively inert C(sp 3 )–H bond of ethers with the C(sp 3 )–H bond of acridanes and amines has been developed, enabling the synthesis of C9-etherified acridanes and α-etherified amines.