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Natural Products of Freshwater Fungi from a Chemical and Bioactive Perspective. [PDF]
J Fungi (Basel)Chen XJ +10 more
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Photocycloaddition Reactions of 2-Pyrones
ChemInform, 2003AbstractFor Abstract see ChemInform Abstract in Full Text.
Tetsuro Shimo, Kenichi Somekawa
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NMR spectra of 2‐pyrone and 2‐pyrone derivatives
Journal of Heterocyclic Chemistry, 1969AbstractAn analysis of the complex NMR spectrum of 2‐pyrone is presented and the spectra of a series of variously substituted 2‐pyrones and 5,6‐dihydro‐2‐pyrones are discussed. It is demonstrated that NMR spectroscopy affords a convenient and reliable method of assigning the position of substituents on the 2‐pyrone nucleus.
W. H. Pirkle, Martin Dines
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Journal of Heterocyclic Chemistry, 1969
AbstractA 1:1 adducl of 2‐pyrone and nitronium fluoroborate has been delected by nmr and is a possible precursor of 5‐nitro‐2‐pyrone, a subsequently formed product. From comparison of the nmr spectra of the 1:1 adduct and 2‐methoxypyrylium fluoroborate, the adduct is believed to be the pyrylium fluoroborate derived from nitration of the carbonyl oxygen
W. H. Pirkle, M. Dines
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AbstractA 1:1 adducl of 2‐pyrone and nitronium fluoroborate has been delected by nmr and is a possible precursor of 5‐nitro‐2‐pyrone, a subsequently formed product. From comparison of the nmr spectra of the 1:1 adduct and 2‐methoxypyrylium fluoroborate, the adduct is believed to be the pyrylium fluoroborate derived from nitration of the carbonyl oxygen
W. H. Pirkle, M. Dines
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ChemInform Abstract: SYNTHESIS OF 5,6‐DIHYDRO‐2‐PYRONE AND 2‐PYRONE
Chemischer Informationsdienst, 1974AbstractVinylessigsäure (I) reagiert mit Formaldehyd (II) in siedendem Eisessig ′in Gegenwart von konz. Schwefelsäure in bescheidenen Ausbeuten zum 5;6‐Dihydro‐2‐pyron (III), das nach Bromierung mit n‐Bromsuccinimid (V) in Tetrachlorkohlenstoff zu (VI) und Dehydrobromierung mit Triäthylamin 2‐Pyron (VII) ergibt.
M. NAKAGAWA +4 more
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Phenyl derivatives of 2-pyrone
Chemistry of Heterocyclic Compounds, 1971Several phenyl dichloropentadienyl ketones containing a hydroxy or methoxy group in the benzene ring as well as a number of 2-pyrones based on them were synthesized. The possibility of the conversion of the latter to the corresponding 2-pyridones on heating them with ammonium salts is demonstrated.
Yu. V. Maevskii, S. V. Sokolovskaya
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A Concise Access to 3-Substituted 2-Pyrones.
The Journal of Organic Chemistry, 2010The development of a modular synthesis of 3-substituted-2-pyrones is described. The attainment of this strategy hinges on a new electrophilic pyrone derivative which can be readily prepared on a multigram scale and which performs very competently in metal-catalyzed cross-coupling reactions with a variety of nucleophiles.
Frébault, F. +3 more
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Preparation of 2-pyrone-5- and 2-pyrone-6-carboxylic acid through ?, ?-dichloroacrolein
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1962We have carried out the synthesis of 2-pyrone-5- and 2-pyrone-6-carboxylic acids usingβ,β-dichloro-acrolein.
L. I. Zakharkin, L. P. Sorokina
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