One Pot Synthesis of C3-Sulfurized Imidazolo [1,2- a ] Pyridines.

A facile and efficient annulation strategy was developed from easily accessible a -bromoketones, aminopyridines and benzazol, which afforded a series of imidazole [1,2- a ]pyridine sulfides in moderate to good yields. The reaction involves the formation of C-N/C-S bond with the advantages of easy operation and wide substrates scope.