Journal ArticleDOI
Heterocyclic Systems; 151. Formation and Hydrolysis of the [4 + 2]-Cycloadduct of 4-Oxo-4H-[1]benzopyran-3-carboxaldehyde with Ethyl Vinyl Ether
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This article is published in Synthesis.The article was published on 1984-12-04. It has received 9 citations till now. The article focuses on the topics: Benzopyran & Bicyclic molecule.read more
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Journal ArticleDOI
Reactions of 3-formylchromone with active methylene and methyl compounds and some subsequent reactions of the resulting condensation products.
Renata Gašparová,Margita Lácová +1 more
TL;DR: A survey of the condensations of 3-formylchromone with various active methylene and methyl compounds, e.g. malonic or barbituric acid derivatives, five-membered heterocycles, etc.
Journal ArticleDOI
Synthesis of 3-alkenyl-2-arylchromones and 2,3-dialkenylchromones via acid-catalysed retro-Michael ring opening of 3-acylchroman-4-ones
TL;DR: 3-Acylchromones and 3-acylflavones undergo efficient conjugate reduction with NaBH 4 in pyridine to give the corresponding chroman-4-ones/flavanones in high yields in both regio- and chemoselective mode.
Journal ArticleDOI
Stereoselective hetero-Diels–Alder reaction of 3-(polyfluoroacyl)chromones with enol ethers. Novel synthesis of 2-RF-containing nicotinic acid derivatives
TL;DR: In this paper, 3.3-(Polyfluoroacyl)chromones undergo heterodiene cycloaddition to 3,4-dihydro-2H-pyran, 2,3-dimethyl-furan and ethyl vinyl ether under mild conditions, producing novel fused pyrans with high stereoselectivity and in good yields.
Journal ArticleDOI
Stereoselective hetero-Diels–Alder reaction of 3-(trifluoroacetyl)chromones with cyclic enol ethers: synthesis of 3-aroyl-2-(trifluoromethyl)pyridines with ω-hydroxyalkyl groups
TL;DR: In this article, 3-(Trifluoroacetyl)chromones undergo heterodiene cycloaddition to 3,4-dihydro-2H-pyran and 2,3-dimethyl-furan under mild conditions, producing novel fused pyrans with high stereoselectivity and in good yields.
Journal ArticleDOI
Synthesis and Reactivity of Electron-Deficient 3-Vinylchromones
TL;DR: The literature data on the methods of synthesis and reactivity of electron-deficient 3-vinylchromones containing electron-withdrawing groups at the exo-cyclic double bond are summarized and systematized for the first time in this paper.
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Bernard Chantegrel,Suzanne Gelin +1 more