Photooxygenation of .ALPHA.,.BETA.- and .BETA.,.GAMMA.-unsaturated enamines in 17-(1-formylethyl)etiojervanes.
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概要
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Photooxygenation of α,β(13,17)- and β,γ(12,13)-unsaturated morpholine enamines (I and II) in 17-(1-formylethyl)etiojervanes by singlet oxygen was carried out under irradiation with fluorescent bulbs. Oxidation of the former (I) afforded the corresponding α,β-unsaturated ketone (III) as the only product which could be isolated, while that of the latter gave two products, one (IV) being a normally oxidized β,γ-unsaturated ketone and the other (VIII) an α,β-unsaturated ketone with the D-ring contracted. Compound (VIII) was not obtained by treatment of IV under the same photooxygenation conditions as for II, indicating that the formation of VIII would not involve IV as an intermediate.
- 公益社団法人 日本化学会の論文
著者
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Murai Akio
Department Of Chemistry Faculty Of Science Hokkaido University
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Masamune Tadashi
Department Of Chemistry Faculty Of Science Hokkaido University
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Sato Chizuko
Department of Chemistry, Faculty of Science, Hokkaido University
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Sasamori Hiroshi
Department of Chemistry, Faculty of Science, Hokkaido University
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