Synthesis of Imidazo1,2-a annulated Pyridines, Pyrazines and Pyrimidines by a Novel Three-Component Condensation

A novel three-component, one-pot condensation yielding 3-amino-substituted imidazo1,2-apyridines, imidazo1,2-apyrazines and imidazo1,2-apyrimidines from aldehydes, isonitriles and 2-amino-pyridine, 2-amino-pyrazine or 2-amino-pyrimidine is described.