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Using an aerobic oxidative coupling, different new imidazo[1,2- a ]- N -heterocycles with gem -difluroroalkyl side chains have been prepared in fair yields by the reaction of gem -difluoroenones with aminopyridines, -pyrimidines and -pyridazines. Condensed heterocycles of this type play an important role as key core structures of various bioactive compounds. Further, starting with a chloroimidazopyridazine derivative, Pd-catalyzed coupling reactions as well as nucleophilic substitutions have been performed successfully in order to increase the molecular diversity.

Preparation of imidazo[1,2-a]-N-heterocyclic derivatives with gem-difluorinated side chains