Novel Secondary Metabolites, Spirosorbicillinols A, B, and C, from a Fungus
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概要
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In our searching program for novel sorbicillin related compounds, three novel compounds, spirosorbicillinols A (1), B (2), and C (3), were isolated from the fermentation broth of the USF-4860 strain isolated from a soil sample. The planar structures of compounds 1–3 were determined from spectroscopic evidence and degradation reaction, and that of 1 was the same as that of 2. The relative stereochemistries of compounds 1–3 were determined by 1H-1H coupling constants, the elucidation of HMBC and NOESY spectra in detail. 1 and 2 were stereoisomers at C8 position, each other. We propose that compounds 1 and 2 were formed by exo and endo intermolecular Diels-Alder reaction between sorbicillinol as a diene and scytolide (proposed precursor-1) as a dienophile, respectively. Similarly, we propose that compound 3 was formed by an endo intermolecular Diels-Alder reaction between sorbicillinol and proposed precursor-2.
- 社団法人 日本農芸化学会の論文
著者
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Abe Naoki
School Of Food And Nutritional Sciences University Of Shizuoka:(present Address)department Of Nutrit
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Hirota Akira
School Of Food And Nutritional Sciences Univ. Of Shizuoka
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SUGIYAMA Yasumasa
School of Food and Nutritional Sciences, University of Shizuoka
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WASHIDA Kazuto
School of Food and Nutritional Sciences, University of Shizuoka
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