PIDA-Mediated 1,2-ipso-Migration in Mannich Bases of Imidazo[1,2-a]pyridines: Preparation of N-Acetoxymethyl/ Alkoxymethyl-N-arylimidazo[1,2-a]pyridine-3-amines.

A PIDA-mediated 1,2-ipso-migration of imidazo[1,2-a]pyridine ring via the formation of aziridine intermediate in the Mannich bases derived from imidazo[1,2-a]pyridines, 2-pyridylamines or arylamine...