Iridium- and rhodium-catalyzed C-H activation and formyl arylation of benzaldehydes under chelation-assistance

Mild and efficient synthesis of benzophenones via Ir(III)- and Rh(III)catalyzed, directing group-assisted formyl C-H arylation of benzaldehydes has been achieved using diaryliodonium salts, in which Rh(III) and Ir(III) catalysts exhibited a complementary substrate scope.