61466-41-9Relevant academic research and scientific papers
Reactions of chromone-3-carboxylic acid and chromone-3-carboxamides with cyanoacetic acid hydrazide
Kornev, Mikhail Yu.,Moshkin, Vladimir S.,Eltsov, Oleg S.,Sosnovskikh, Vyacheslav Ya.
, p. 72 - 74 (2016)
Chromone and chromone-3-carboxylic acid react with cyanoacetic acid hydrazide in the presence of NaOEt in boiling ethanol to form 6-(2-hydroxyphenyl)-1H-pyrazolo[3,4-b]pyridin-3(2H)-one (58-62% yields), whereas reaction between chromone-3-carboxamides and cyanoacetic acid hydrazide under the same conditions affords 1-amino-2,5-dioxo-2,5-dihydro-1H-chromeno[4,3-b]pyridine-3-carbonitriles (50-67% yields).
Synthesis and evaluation of potential pharmacophores derived from 4-oxo-4H-1-benzopyran-3-carboxaldehyde
Coutinho, Dionysia L M,Fernandes, Peter S
, p. 573 - 577 (2007/10/02)
The preparation of hydrazone derivatives of 4-oxo-4H-1-benzopyran-3-carboxaldehyde (2a-c, 4a-c, 5, 6a,b), 3-aryl-1-(benzopyran-4-one-3-yl)-propen-3-one (8a-c), ethyl 2-cyano-3-(benzopyran-4-one-3-yl)acrylate (10) and thioacetal derivatives of 4-oxo-4H-1-b
4-Diazomethylcoumarins and Related Stable Heteroaryldiazomethanes. Thermal Conversion into Condensed Pyrazoles
Ito, Keiichi,Maruyama, Junko
, p. 1681 - 1687 (2007/10/02)
4-Diazomethyl-substituted coumarins, 1-methyl-2(1H)-quinolinones, 1-thiocoumarin and their tricyclic analogs were found to be easily cyclized into the corresponding pyrazole isomers condensed with heteroaromatics.Thermodependent feature of these conversio
Hetericyclic Systems. Part 14. Condensation Reactions of 2-(4-Oxo-4H-1-benzopyran-3-yl)-1,3-dioxolane
Ghosh, Chandra Kanta,Bandyopadhyay, Chandrakanta,Morin, Christophe
, p. 1989 - 1994 (2007/10/02)
Nitrogen nucleophiles under 1,4-addition with the title acetal (4; R=H, Me, and Cl) to give an intermediate that ultimately produces in most cases the same product as is obtained from the corresponding aldehyde (3) under similar conditions.Thus, compound
