InCl3 Catalyzed One-Pot Synthesis of Substituted Pyrroles and 2-Pyrones.

Tetrasubstituted pyrroles (III) are prepared from 1,4-enediones (I) and β-dicarbonyl compounds (II) employing ammonium acetate as a nitrogen source, through a combination of Michael addition and Paal—Knorr cyclization.