Answers are grounded in this paper and cite their sources.
6‐Amino‐5‐cyano‐4‐aryl‐1,4‐dihydropyrano[2,3‐c]pyrazoles were synthesized by three‐component reaction of aromatic aldehydes, malononitrile, and 3‐methyl‐1‐phenyl‐2‐pyrazolin‐5‐one using triethylbenzylammonium chloride (TEBA) as catalyst in aqueous media. The reaction has the advantages of good yield, less pollution, ease of separation, and of being environment friendly.
No takes yet. Share an insight, caveat, or question.
Shi et al. (2004) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: