Heating of ethyl 3-[β-(benzimiadazol-2-yl)hydrazino]-2-(polyfluorobenzoyl)acrylates in acetonitrile with potassium fluoride or triethylbenzylammonium chloride leads to derivatives of novel heterocyclic systems of benzimidazo[1,2-a]pyrazolo-[1,5-c]quinazoline.