Background: A clean and environmentally benign route to 4H-benzo[h]chromene-3-
carbonitriles has been developed via three-component condensation reaction of various benzyl alcohols,
malononitrile and 1-naphthol using DBU-hydrobromide-perbromide as an efficient oxidizing reagent
at room temperature.
Methodology: The present methodology offers several advantages such as solvent-free conditions, excellent
yields, simple procedure, mild conditions and reduced environmental consequences.
Conclusion: All of synthesized compounds were characterized by IR, NMR and elemental analyses.