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Selective oxidation of pyrogallol-type catechins with unripe fruit homogenate of Citrus unshiu and structural revision of oolongtheanins
http://hdl.handle.net/10069/35841
http://hdl.handle.net/10069/3584175d06365-c6cc-4d0d-b078-198a6cce02df
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Supple.pdf (5.1 MB)
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TetLet71_2540.pdf (391.5 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2017-04-30 | |||||
タイトル | ||||||
タイトル | Selective oxidation of pyrogallol-type catechins with unripe fruit homogenate of Citrus unshiu and structural revision of oolongtheanins | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Black tea | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Catechin | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Citrus unshiu | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Oolongtheanins | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Oxidation | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Matsuo, Yosuke
× Matsuo, Yosuke× Tadakuma, Fumiya× Shii, Takuya× Saito, Yoshinori× Tanaka, Takashi |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | In our previous chemical study of the production mechanism of black tea polyphenols, we demonstrated that Japanese pear fruit homogenate oxidizes green tea catechins bearing pyrogallol-type and catechol-type B-rings to produce theaflavins and dehydrotheasinensins. In contrast, unripe fruit homogenate of Citrus unshiu selectively oxidizes pyrogallol-type catechins to yield only dehydrotheasinensins. The difference in the selectivity of the two homogenates is probably related to the lower redox potential of pyrogallol-type catechins. The oxidation of epigallocatechin with C. unshiu homogenate gave two new compounds, including an ethanol adduct of an oolongtheanin precursor and epigallocatechin 4′-O-rutinoside, together with theasinensin C, dehydrotheasinensin E, and desgalloyl oolongtheanin. The structure of desgalloyl oolongtheanin should be revised based on the spectroscopic and computational data collected in the current study, and a mechanism responsible for the production of oolongtheanins is also proposed. | |||||
書誌情報 |
Tetrahedron 巻 71, 号 17, p. 2540-2548, 発行日 2015-04-29 |
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出版者 | ||||||
出版者 | Elsevier Limited | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00404020 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1016/j.tet.2015.03.016 | |||||
権利 | ||||||
権利情報 | c 2015 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Tetrahedron, 71(17), pp.2540-2548; 2015 |