Transition‐Metal‐Free Synthesis of Acridones via Base‐Mediated Intramolecular Oxidative C−H Amination

Intramolecular oxidative C−H amination of 2‐aminobenzophenones was achieved in the presence of potassium tert‐butoxide and dimethyl sulfoxide. A series of functionalized acridones were prepared in moderate to excellent yields in a mild, efficient, and transition‐metal‐free manner.