A One-Pot, Four-Component Synthesisof N-Substituted 2,4-Diarylimidazoles

A one-pot, four-component synthesis of 1,2,4-trisubstituted 1H-imidazoles is described. Heating a mixture of a 2-bromoacetophenone, an aldehyde, a primary amine, and ammonium acetate under solvent-free conditions affords functionalized imidazoles in good to excellent yields.