2-pyrone - Open Access .click

Results 101 to 110 of about 17,659,431 (225)

, 1940
2 : 6-Dihydroxy-1 : 4-pyrone has been obtained from acetone dicarboxylic acid and its various derivatives have been ...
R. KAUSHAL
core +1 more source

Fragaria × ananassa cv. Senga Sengana Leaf: An Agricultural Waste with Antiglycation Potential and High Content of Ellagitannins, Flavonols, and 2-Pyrone-4,6-dicarboxylic Acid. [PDF]

Molecules, 2022
Fecka I, Bednarska K, Włodarczyk M.
europepmc +1 more source

Synthesis in Coumarino-pyrone and Furocoumarin Groups, Part I. Synthesis of 4,2'-Diznethyl-6-ethylconmarino-7,8-γ-pyrone and 4,4'-Dimethyl-6-ethylcouniarino-7,8,α-pyrone

, 1964
The Kostanecki acylation of 4-methyl-6-ethyl-8-acetylumbelliferone furnishes two compounds: (A) C18H16O3. m.p. 198°, and (B) C16H14O4. m.p. 335°. Compound (A) on hydrolysis with caustic alkali furnishes (i) an acid, C13H15O5, m.p.
K. A. Thakar
core +1 more source

Photoinduced transformation of matrix-isolated methyl 2-pyrone-3-carboxylate into methyl 2-pyrone-5-carboxylate via intramolecular hydrogen shift in open-ring aldehyde-ketene [PDF]

, 2020
Photochemical transformations of methyl 2-pyrone-3-carboxylate (mp3c) were studied by matrix-isolation technique. The dominating primary photoreaction induced by UV (k > 295 nm) light was a-bond cleavage leading to open-ring aldehyde-ketene.
Maciej J Nowak +3 more
core

Loss of CO from 4,6-Dimethyl-2-pyrone and 2,6-Dimethyl-4-prypne Radical Cations

, 1985
Grützmacher H-F, Spilker R. Loss of CO from 4,6-Dimethyl-2-pyrone and 2,6-Dimethyl-4-prypne Radical Cations. Organic Mass Spectrometry.
Grützmacher, Hans-Friedrich, Spilker, Rüdiger +1 more
core +2 more sources

ANNULATION REACTIONS OF 4-METHOXY-2-PYRONE WITH VARIOUS ACTIVE METHYL COMPOUNDS

, 1989
Some phenolic biphenyl compounds have been synthesised via the annulation reactions of 4-methoxy-2- pyrone with various active methyl ...
Tanyeli, Cihangir, TARHAN, O
core +1 more source

Essai de synthèse de diènes dérivés de pyrone-2 et de pyrannylidène-2

, 1978
La première partie de ce mémoire est consacrée à la présentation d'un essai de synthèse d'orthoesters de pyrone-2 simple ainsi qu'à leur réactivité face à certains diénophiles.
Sauvé, Gilles
core

Regioselective Pd-Catalyzed Synthesis and Application of 3-Methyl-5-bromo-2-pyrone toward Keto-phomactin A

, 2016
An efficient one-step synthetic protocol for 3-methyl-5-bromo-2-pyrone was developed using the C3-selective Pd-catalyzed coupling reaction of 3,5-dibromo-2-pyrone with Me3Al−dimethylaminoethanol complex. A subsequent seven-step reaction sequence provided
Young-Suk Cho (2534866) +3 more
core +1 more source

Total Syntheses of (±)-Crinine, (±)-Crinamine, and (±)-6a-epi-Crinamine via the Regioselective Synthesis and Diels−Alder Reaction of 3-Aryl-5-bromo-2-pyrone

, 2016
We have devised a new unified synthetic protocol to (±)-crinine, (±)-crinamine, and (±)-6a-epi-crinamine from the Diels−Alder cycloadduct of 3-(3,4-methylenedioxyphenyl)-5-bromo-2-pyrone with TBS vinyl ether.
Eun-Ju Jung (2300788) +3 more
core +1 more source

Support Surface Chemistry Evolution During the Preparation of Metal Oxide–Activated Carbon Catalysts by Wet Impregnation: A FT-IR Spectroscopy Analysis

Compounds
The present work is aimed at shedding light on the evolution of surface chemistry of a commercial activated carbon (AC) support during the preparation of supported metal oxide (MO) catalysts by the conventional wet impregnation method.
Adrián Bogeat-Barroso +3 more
doaj +1 more source

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