Synthesis of 2‐Aminochromene Derivatives Catalyzed by KF/Al₂O₃

Abstract

A series of 2‐aminochromene derivatives include 2‐aminobenzo‐[h]chromene and naphtha[1,2‐b;6,5‐b′]dipyrans derivatives were synthesized from arylaldehyde, malononitrile or ethyl cyanoacetate with 1‐naphthol or 1,5‐naphthalenediol in refluxing ethyl alcohol catalyzed by KF‐Al₂O₃. The structure of the products was confirmed by X‐ray analysis.

Keywords:

• 2‐Aminochromene
• Naphtho[1,2‐b;6,5‐b′]dipyrans
• Synthesis

Acknowledgment

We are grateful to the Foundation of the “Surpassing Project” of Jiangsu Province for financial support.