Photoreactions of flavanones.
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概要
- 論文の詳細を見る
Parent and substituted flavanones undergo photochemical opening of the pyrone ring to give corresponding 2′-hydroxychalcones in benzene, pyridine, acetonitrile <I>etc.</I>, the yields varying from 0 to 70% with substituents. The reaction is depressed by the addition of 1,3-pentadiene, nitrosobenzene, or acrylonitrile. On the other hand, flavanone and 4-chromanone undergo photoreduction in 2-propanol to give reductive coupling products and solvent adducts as isomeric mixtures. 7,8-Benzoflavanone does not undergo photoreduction in 2-propanol but the ring opening reaction instead. Mechanisms have been discussed in terms of the relative contribution and π,π<SUP>*</SUP> character in the lowest triplet states.
- 公益社団法人 日本化学会の論文
著者
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Matsushima Ryoka
Department Of Applied Chemistry Faculty Of Engineering Shizuoka University
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MIZUNO HIDEO
Department of Animal Breeding, Faculty of Agriculture, University of Tokyo
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Morioka Motonobu
Department of Industrial Chemistry, Faculty of Engineering, Shizuoka University
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Suzuki Morio
Department of Industrial Chemistry, Faculty of Engineering, Shizuoka University
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Kishimoto Tsuneo
Department of Industrial Chemistry, Faculty of Engineering, Shizuoka University
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