Synthesis of carbazolones and 3-acetylindoles via oxidative C-N bond formation through PIFA-mediated annulation of 2-aryl enaminones

A series of carbazolone derivatives and 3-acetylindoles have been achieved via PIFA-mediated intramolecular cyclization of 2-aryl enaminones. This process allows the N-moiety on the side-chain to be annulated to the benzene ring via the metal-free oxidative aromatic C-N bond formation.