Results 131 to 140 of about 2,638 (179)

Iodination of 6-aryl-2-pyrones

Chemistry of Heterocyclic Compounds, 1984
The iodination of 6-aryl-2-pyrones with iodine chloride in glacial acetic acid leads to the corresponding 3-iodo derivatives. 3-Cyano-6-phenyl-2-pyrone and 3-phenylethynyl-6-phenyl-2-pyrone were obtained by replacement of the iodo group by cyano and phenylethynyl groups.
S. V. Sokolovskaya, L. K. Moldovanova
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One step preparation of bromo-2-pyrones via bromo-decarboxylation of 2-pyrone-carboxylic acids

Tetrahedron Letters, 2001
Abstract Synthetically valuable 3-bromo-2-pyrone, 3-bromocoumarin, 5-bromo-2-pyrone, and 3,5-dibromo-2-pyrone were prepared in one step from readily available 2-pyrone-carboxylic acids via bromo-decarboxylation in good to fair yields.
Cheon-Gyu Cho, Jung-Sang Park, In-Hak Jung, Haiwon Lee   +3 more
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Phenolic derivatives of 2-pyrone. I.

Chemistry of Heterocyclic Compounds, 1971
The condensation of hydroxy- and methoxyacetophenones with 1,1,1,3-tetrachloro-3-ethoxypropane or β, β-dichloroacrolein in an acid medium has yielded a number of dichlorodienyl hydroxyphenyl ketones which are converted into the corresponding 2-pyrones in acetic or propionic acids in the presence of phosphoric acid.
Yu. V. Maevskii, S. V. Sokolovskaya, I. P. Komkov   +2 more
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3-Hydroxy-2-pyrone

2001
[496-64-0] C5H4O3 (MW 112.09) InChI = 1S/C5H4O3/c6-4-2-1-3-8-5(4)7/h1-3,6H InChIKey = LIPRKYKMVQPYPG-UHFFFAOYSA-N ([4 + 2] cycloaddition vinylketene diene equivalent2, 3) Physical Data: white, crystalline solid; mp 92 °C; mp (dihydrate) 80–85 °C; bp 112 °C/20 mmHg; sublimes at 50 °C/4 mmHg; λmax 294 nm (H2O ...
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Synthesis of 5,6-Dihydro-2-pyrone and 2-Pyrone

Synthesis, 1974
Masako NAKAGAWA, Masakatsu TONOZUKA, Michiko OBI, Midori KIUCHI, Tohru HINO, Yoshio BAN   +5 more
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2-Pyrones. VII. 2-Pyridones from 2-Pyrones

Journal of the American Chemical Society, 1954
Richard H. Wiley, L. H. Knabeschuh, A. L. Duckwall, N. R. Smith   +3 more
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Photochemical reactions of 2-pyrone and thermal reactions of the 2-pyrone photoproducts

Journal of the American Chemical Society, 1969
William H. Pirkle, L. H. McKendry
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Phenolic derivatives of 2-pyrone

Chemistry of Heterocyclic Compounds, 1970
Yu. V. Maevskii, S. V. Sokolovskaya, I. P. Komkov   +2 more
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Sustainable synthesis of 2-pyrones and application of biobased 2-pyrones - Atypical reactivity of anthracene derivatives

2021
The first chapter of the present thesis deals with the synthesis of 2-pyrones starting from renewable resources (Scheme 109). The synthetic sequences started from furfuryl alcohol (18) and its corresponding derivatives 314, which were readily available from inexpensive furfural (310) – a platform chemical that is derived from agricultural waste ...
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2-Pyrones. XIV.¹ The Hydrogenation of 2-Pyrones

Journal of the American Chemical Society, 1955
Richard H. Wiley, Albert J. Hart
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