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