16 Photooxidation of Prenylflavones Isolated from the Root Bark of Morus alba L.
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- Nomura Taro
- Faculty of Pharmaceutical Science, Toho University
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- Fukai Toshio
- Faculty of Pharmaceutical Science, Toho University
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- Yamada Sachiko
- Faculty of Pharmaceutical Science, Toho University
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- Hirano Yoji
- Faculty of Pharmaceutical Science, Toho University
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- Katayanagi Masa
- Faculty of Pharmaceutical Science, Toho University
Bibliographic Information
- Other Title
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- 16 桑根皮より得られるプレニルフラボン類の光酸化反応について
Description
The structures of five new flavone derivatives, morusin, cyclo-morusin, compound A, kuwanone A, and kuwanone B, which had been isolated from the root bark of the cultivated mulberry tree (a kind of Morus alba L.), were shown to be I, II, III, IV, and V, respectively. During the course of the study, we had encountered an unusual photooxidation of morusin (I), When a solution of I in CHCl_3 was exposed to bright sunshine, hydroperoxide (IX) was obtained in very high yield. The structure (IX) of this hydroperoxide was determined from chemical and spectral analysis. The mechanism of this reaction was discussed and the phenoxy radical (XV) was suggested to be the intermediate of this photooxidation.
Journal
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- Symposium on the Chemistry of Natural Products, symposium papers
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Symposium on the Chemistry of Natural Products, symposium papers 20 (0), 115-122, 1976
Symposium on the Chemistry of Natural Products Steering Committee
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Details 詳細情報について
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- CRID
- 1390282681051498624
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- NII Article ID
- 110006677903
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- ISSN
- 24331856
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- Text Lang
- ja
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed