Answers are grounded in this paper and cite their sources.
The condensation of 1-naphthol, malononitrile and aromatic aldehydes promoted by potassium phosphate tribasic trihydrate was carried out under solvent-free conditions to afford corresponding 2-amino-4H-chromenes in moderate to good yields in short time.
No takes yet. Share an insight, caveat, or question.
Zhou et al. (2012) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: