PROBLEM TO BE SOLVED: To provide a method for efficiently producing, from water-insoluble polyphenol, a sugar adduct thereof.SOLUTION: The method for producing a sugar adduct of water-insoluble polyphenol includes steps of (1) subjecting a water-insoluble polyphenol (A) to heat treatment at 100-180°C in the presence of an aqueous medium to obtain a heat-treated solution and (2) adding a sugar donor (B) and glycosyltransferase to the resulting heat-treated solution and starting sugar transfer reaction within 300 minutes after the heat treatment to obtain a sugar adduct of the water-insoluble polyphenol (A).COPYRIGHT: (C)2013,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)及び(2):(1)水性媒体の存在下、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糖供与体(B)及び糖転移酵素を添加し、加熱処理後300分以内に糖転移反応を開始し、難水溶性ポリフェノール類(A)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
