PROBLEM TO BE SOLVED: To provide a method for efficiently producing a sugar adduct from water-insolubile polyphenols.SOLUTION: A production method of a sugar adduct of water-insolubile polyphenols includes the following processes (1), (2) and (3): (1) a process of heat-treating the water-insolubile polyphenols (A) that has a rhamnoside structure at 100-180°C in the presence of an aqueous medium to obtain a heat-treated liquid (2) a process of beginning a rhamnose elimination reaction to the obtained heat-treated liquid within 300 minutes after the heat treatment to obtain a reaction liquid that contains water-insoluble polyphenols (A) from which rhamnose has been eliminated and (3) a process of adding a sugar donor (B) and a glycosyltransferase to the obtained reaction liquid to obtain the sugar adduct of the water-insoluble polyphenols from which the rhamnose has been eliminated by a transglycosylation.COPYRIGHT: (C)2014,JPO&INPIT【課題】効率よく難水溶性ポリフェノール類からその糖付加物を製造する方法の提供。【解決手段】次の工程(1)、(2)及び(3):(1)水性媒体の存在下、ラムノシド構造を有する難水溶性ポリフェノール類(A)を100~180℃で加熱処理し、加熱処理液を得る工程、(2)得られた加熱処理液に対し、加熱処理後300分以内にラムノース脱離反応を開始し、ラムノースが脱離した難水溶性ポリフェノール類(A’)を含む反応液を得る工程、及び(3)得られた反応液に糖供与体(B)及び糖転移酵素を添加し、糖転移反応によりラムノースが脱離した難水溶性ポリフェノール類の糖付加物を得る工程、を含む難水溶性ポリフェノール類の糖付加物の製造方法。【選択図】なし
