Journal ArticleDOI
Benzopyrans. Part 42 [1]. Reactions of 4-oxo-4H-1-benzopyran-3-carbaldehyde with some active methylene compounds in the presence of ammonia
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The title aldehyde 1 in the presence of ammonia gives the pyridine derivatives 9-11 respectively with acetylacetone, diethyl malonate and ethyl cyanoacetate, and the coumarinopyridines 25 and 26, respectively as discussed by the authors.About:
This article is published in Journal of Heterocyclic Chemistry.The article was published on 2001-11-01. It has received 39 citations till now. The article focuses on the topics: Diethyl malonate & Pyridine.read more
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Recyclizations of 3-formylchromones with binucleophiles
Andrey S. Plaskon,Andrey S. Plaskon,Oleksandr O. Grygorenko,Oleksandr O. Grygorenko,Sergey V. Ryabukhin +4 more
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One-pot three-component reaction of 3-(polyfluoroacyl)chromones with active methylene compounds and ammonium acetate: regioselective synthesis of novel RF-containing nicotinic acid derivatives
TL;DR: In this article, the C-2 atom of the chromone system with pyrone ring-opening and subsequent cyclization to 5-salicyloyl-2-methyl-5-(polyfluoroalkyl)-5H-chromeno[4,3-b]pyridine-3-carbonitriles was investigated.
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Synthesis of quinolines and fused pyridocoumarins from N-propargylanilines or propargylaminocoumarins by catalysis with gold nanoparticles supported on TiO2
TL;DR: In this article, the activation of the triple bond of 6-propargylaminocoumarins by gold nanoparticles supported on TiO 2 has been shown to yield quinolines.
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Chemistry and application of 4-oxo-4H-1-benzopyran-3-carboxaldehyde
TL;DR: The chemistry and application of the title aldehyde and some simple derivatives thereof are reviewed in this paper, where the authors propose a simple derivative of the aldehydes, which they call simple aldeheeds.
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Synthesis of some new azole, azepine, pyridine, and pyrimidine derivatives using 6‐hydroxy‐4H‐4‐oxo[1]‐benzopyran‐3‐ carboxaldehyde as a versatile starting material
TL;DR: This paper showed that 3-formyl chromone with hydroxylamine hydrochloride afforded the corresponding oxime 2 that was converted to nitrile 3 by using hippuric acid.
References
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Chemistry of 4-Oxo-4H-[1]benzopyran-3-carboxaldehyde
TL;DR: The authors present an examen approfondi de la synthese, des proprietes et des reactions de l'oxo-4 chromenecarbaldehyde-3 and l'utilisation de ses condensats for the preparation of divers systemes chimiques.
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The synthesis of pyridine derivatives from 3‐formylchromone
TL;DR: In this article, the pyridine ring forming reactions are discussed and the factors determining the formation and regiospecificity of the ring-forming reactions are also discussed, as well as the properties of pyridines.
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