Synthesis of new (+)-usnic acid derivatives with the flavone structure |
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| Authors: | D. N. Sokolov M. E. Rakhmanova O. A. Luzina A. V. Shernyukov N. F. Salakhutdinov |
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| Affiliation: | 1. N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 9 prosp. Akad. Lavrent’eva, 630090, Novosibirsk, Russian Federation
2. Novosibirsk National Research State University, 2 ul. Pirogova, 630090, Novosibirsk, Russian Federation
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| Abstract: | Reactions of a chalcone derivative (synthesized earlier from usnic acid) with various oxidants (hydrogen peroxide, tert-butyl hydroperoxide, and dichlorodicyanobenzoquinone) gave new flavonols, dihydroflavonols, and flavones. Treatment of the starting chalcone with a nucleophilic reagent (NH2NH2·H2O) afforded a dihydropyrazole-containing derivative. |
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