Copper‐Catalyzed One‐Pot Arylation and Cyclization of Diaryliodonium Salts Derived from o‐Iodoanilines for Indolo[2,3‐b]indoles Syntheses

Abstract One‐pot synthesis of various indolo[2,3‐ b ]indoles has been accomplished from a copper‐catalyzed transformation of easily accessible 2‐(substituted‐amino)aryl)(mesityl)iodonium salts and indole derivatives. Reaction offers great functional group toleration, providing a series of indolo[2,3‐ b ]indole derivatives in good yields. Additionally, intramolecular cyclization of 2‐(substituted‐amino)aryl)(mesityl)iodonium salts in the presence of copper‐catalyst provided direct access to benzoxazole derivatives.