One-Pot Synthesis of Diarylamines from Two Aromatic Amines via Oxidative Dearomatization–Imino Exchange–Reductive Aromatization

A one-pot synthetic strategy for diarylamines using only aromatic amines as starting materials has been developed. This method involved a PhI(OAc)₂-induced oxidative dearomatization of N-sulfonyl protected para-substituted anilines, a Bi(OTf)₃-catalyzed imino exchange reaction between N-sulfonyl cyclohexadienimines and aromatic amines, and a CF₃COOH/Zn mediated reductive aromatization of the resulting N-aryl cyclohexadienimines.