A novel synthesis of 2-phenylH-imidazio[1,2-α] pyridines is described from a one-pot, three-component reaction between pyridine, guanidine (urea or thiourea) and α-bromoketones under microwave irradiation and solvent-free conditions in excellent yields.
1-Azabicyclo[3.2.1]oct-3-ene were synthesized by the intramolecular carbocationic cyclization of 1-[2-hydroxy-2-(4-R-phenyl)ethyl]-1,2,3,6-tetrahydropyridines in a trifluoromethanesulfonic acid medium