Polyethylene Gylcol (PEG-400) as an Efficient and Recyclable Reaction Medium for One-Pot Three-Component Synthesis of Imidazo[1,2-a]pyridine Derivatives
An iron(III)-catalyzed one-potthree-component cross-coupling nitration reaction of 2-aminopyridines, aldehydes and nitroalkanes, straightforwardly forms imidazo[1,2-a]pyridinederivatives and is described in this report. The system shows good functional-group tolerance and proceeds smoothly in moderate to good yields.