Answers are grounded in this paper and cite their sources.
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.
No takes yet. Share an insight, caveat, or question.
Wang et al. (2004) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: