ChemInform Abstract: Regioselective Synthesis of Pyrrolo[1,2-a]imidazoles and Imidazo[1,2-a]pyridines

Regioselective aza-ene reactions and cyclocondensation reactions of heterocyclic ketene aminals with benzoyl- or acetylacrylate lead to pyrrolopyrimidines, erroneously named as pyrroloimidazoles, and imidazopyridines efficiently under catalyst-free conditions.