Journal ArticleDOI
Chemistry of 4-Oxo-4H-1-benzopyran-3-carbonitrile
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TLDR
The 3-cyanochromone 3-oxide 4-oxo-4H1-benzopyran-3-yl moiety is referred to as Chr-X as discussed by the authors.About:
This article is published in Journal of Heterocyclic Chemistry.The article was published on 2005-09-01. It has received 31 citations till now. The article focuses on the topics: Nitrile & Cycloaddition.read more
Citations
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Reactions of 3-(polyfluoroacyl)chromones with hydroxylamine: synthesis of novel RF-containing isoxazole and chromone derivatives
TL;DR: In this article, the pyrone ring of 3-polyfluoroacyl-4 H -chromeno[3,4- d ]isoxazol-4-ols was opened by nucleophilic 1, 4-addition and subsequent cyclization to 4 polyfluoroalkyl)-4 H-chromeno, which was then converted to 3-R F -4-salicyloylisoxazoles by simple heating.
Journal ArticleDOI
A reinvestigation of the reactions of 3-substituted chromones with hydroxylamine. Unexpected synthesis of 3-amino-4H-chromeno[3,4-d]isoxazol-4-one and 3-(diaminomethylene)chroman-2,4-dione
TL;DR: In this paper, a proof of structures and a probable reaction pathway for 3-substituted chromones with hydroxylamine in alkaline medium were presented, and a possible reaction pathway was presented for 3-(diaminomethylene)chroman-2,4-dione.
Journal ArticleDOI
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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One-pot synthesis of functionalized spirobenzofuranones via MCR involving 3-cyanochromones.
Tryfon Zarganes-Tzitzikas,Michael A. Terzidis,Julia Stephanidou-Stephanatou,Constantinos A. Tsoleridis,George E. Kostakis +4 more
TL;DR: Another aspect concerning chromone chemistry leading to the one-pot synthesis of functionalized novel spirobenzofuranones has been described, and a plausible mechanistic rationale is proposed.
Journal ArticleDOI
One-pot five-component synthesis of spirocyclopenta[b]chromene derivatives and their acid-catalyzed rearrangement.
Michael A. Terzidis,Tryfon Zarganes-Tzitzikas,Constantinos Tsimenidis,Julia Stephanidou-Stephanatou,Constantinos A. Tsoleridis,George E. Kostakis +5 more
TL;DR: The structure elucidation of the products was accomplished by 1D and 2D NMR experiments and confirmed by X-ray crystallographic analysis, and full assignment of all (1)H and (13)C NMR chemical shifts has been unambiguously achieved with the aid of DFT/GIAO calculations.
References
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Journal ArticleDOI
Reaktionen mit 4‐Oxo‐4H‐chromen‐3‐carbaldehyd, I Herstellung und Reaktionen von 2‐Amino‐4‐oxo‐4H‐chromen‐3‐carbaldehyd
Uwe Dr Petersen,Helmut Heitzer +1 more
TL;DR: In this article, the synthesis and reaction of 2-amino-4-oxo-4H-chromene-3-carbaldehyde from 4-0x0-4h-chromenones and its reactions to give pyrimidinochromenone 5, pyridino chromenones 6, 7 and 2-AMINO-4.
Journal ArticleDOI
A Rare Acid-Promoted Elimination of O-Methyl Oximes: A Practical Synthesis of 3-Cyano-4-benzopyrones
Richard P. Hsung,Craig A. Zificsak,Lin-Li Wei,Luke R. Zehnder,Francis Park,Michelle Kim,Thuy-Trang T. Tran +6 more
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Synthesis of 3-(1H-tetrazol-5-YL)chromones and a novel degradation reaction of tetrazole ring with vilsmeier reagents
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Conjugate addition of cuprate reagents to chromones: A route to 2-substituted chroman-4-ones
TL;DR: Chromones (4-oxo-4H-1-benzopyrans) activated by electron-withdrawing groups attached to C-3 undergo efficient 1,4-additon of cuprate reagents, producing 2,3-disubstituted chroman-4-ones.
Journal ArticleDOI
Efficient synthesis of benzopyrano[2,3-b]pyridines by sequential reactions of 1,3-bis-silyl enol ethers with 3-cyanobenzopyrylium triflates
Peter Langer,Bettina Appel +1 more
TL;DR: In this paper, a condensation of 1,3-bis-silyl enol ethers with 3-cyanobenzopyrylium triflates and subsequent domino "retro-Michael-lactonization-aldol" reactions is described.
Related Papers (5)
Reaktionen mit 4‐Oxo‐4H‐chromen‐3‐carbaldehyd, I Herstellung und Reaktionen von 2‐Amino‐4‐oxo‐4H‐chromen‐3‐carbaldehyd
Uwe Dr Petersen,Helmut Heitzer +1 more