80472-47-5Relevant academic research and scientific papers
Benzopyrans. Part 42 [1]. Reactions of 4-oxo-4H-1-benzopyran-3-carbaldehyde with some active methylene compounds in the presence of ammonia
Ghosh, Chandra Kanta,Ray, Anirban,Patra, Amarendra
, p. 1459 - 1463 (2001)
The title aldehyde 1 in the presence of ammonia gives the pyridine derivatives 9-11 respectively with acetylacetone, diethyl malonate and ethyl cyanoacetate, and ethyl (or methyl)-1-benzopyrano[4,3-b]pyridine-3-carboxylate 22 (or 23) with ethyl (or methyl
Biginelli reaction on 4-oxo-4H-1-benzopyran-3-carboxaldehyde - A search for reaction pathway
Bandyopadhyay, Chandrakanta,Nag, Partha Pratim,Sur, Kumar Ranabir,Patra, Ranjan,Banerjee, Subhabrata,Sen, Arunabha,Ghosh, Tapas
, p. 132 - 136 (2007/10/03)
On heating a mixture of 3-formylchromone 1, active methylene compound 2 or 3 and urea (4) In AcOH produces dihydropyrimidinones 10 or 11, whereas use of thiourea in place of urea produces 1,3-thiazine derivative 14 or 15 and the above reactions pass through the Knoevenagel condensate 5 or 6.
