Abstract
One-pot process was studied between a substituted 4-hydroxy-2Н-pyran-2-one and aromatic aldehydes and ammonium acetate in the conditions of modified Hantzsch reaction in acid environment under thermal and microwave activation. Arylmethylenebis-4-hydroxy-2Н-pyridin-2-ones, hydrochromenopyridinone, and their oxygen-containing heteroanalogs were isolated. A primary condensation was confirmed into bispyran-2-one adducts, and at the use of salicilaldehyde, into pyranochromene with subsequent recyclization of pyranone fragments in pyridinone ones.
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Original Russian Text © I.V. Strashilina, E.M. Arzyamova, O.V. Fedotova, 2018, published in Zhurnal Organicheskoi Khimii, 2018, Vol. 54, No. 8, pp. 1162–1167.
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Strashilina, I.V., Arzyamova, E.M. & Fedotova, O.V. Synthesis of Fused 2Н-Pyridin-2-ones under the Conditions of Multicomponent Hantzsch Reaction. Russ J Org Chem 54, 1173–1178 (2018). https://doi.org/10.1134/S1070428018080092
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DOI: https://doi.org/10.1134/S1070428018080092