野菜・果実のフラボノイドに関する研究　第１報　タマネギに存在するフラボノイド配糖体の分析および化学合成による同定

DOI Web Site 被引用文献15件 参考文献17件

書誌事項

タイトル別名
  • Flavonoid in Fruits and Vegetables Part I. Isolation of Flavonoid-Glycosides in Onion and Identification by Chemical Synthesis of the Glycosides.
  • タマネギ ニ ソンザイスル フラボノイド ハイトウタイ ノ ブンセキ オヨビ
  • Flavonoid in Fruits and Vegetables Part I
  • 野菜・果実のフラボノイドに関する研究(第1報)

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説明

Flavonoids in edible part of onion were isolated and their structures were determined by SIMS and C-13 NMR comparing with the flavonol glucosides synthesized by Koenigs-Knorr reaction. The resultS were as follows: (1) By Koenigs-Knorr reaction using quercetin as an aglycon and tetraacetyl-1-α-bromoglucose, quercetin-3-O-β-glucoside, 4'-O-β-glucoside, 7-O-β-glucoside, 3, 4'-diO-β-glucoside, and 3, 7-diO-β-glucoside were obtained with the small amounts of 7, 4'-diO-β-glucoside. And their chemical structures, except 7, 4'-diO-β-glucoside, were determined by C-13 NMR. (2) By the same method using kaempferol as an aglycon, kaempferol-3-β-glucoside, 7-O-β-glucoside and 3, 7-diO-β-glucoside were obtained. And their structures were also determined by C-13 NMR. (3) The major flavonoid in onion is quercetin-4'-O-β-glucoside, closely followed by quercetin-3, 4'-diO-β-glucoside. And these two flavonols account for more than 85% of the total amount of flavonoids in onion. (4) The flavonoid account for more than 1% of total flavonoid in onion were quercetin-3-O-β-glucoside, 7-O-β-glucoside, 7, 4'-diO-β-glucoside and isorhamnetin-4'-O-β-glucoside. (5) The minor flavonoid, isorhamnetin-3, 4'-diO-β-glucoside, kaempferol-3, 4'-diO-β-glucoside and kaempferol-4'-O-β-glucoside were also detected in onion.

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