The present invention provides a method for preparing a glycoside of a flavonoid compound, which comprises the step of treating flavonoid and a glycosyl donor with an enzymatic agent having glycosylation activity and being derived from the genus
Trichoderma
(preferably
Trichoderma viride
or
Trichoderma reesei
). Such a flavonoid compound includes a catechin compound or a methylated derivative thereof, and the glycosyl donor includes a carbohydrate containing a maltotriose residue (preferably maltotriose, maltotetraose, maltopentaose, maltohexaose, maltoheptaose, dextrin, γ-cyclodextrin or soluble starch). Glycosides obtained by the present invention have higher water solubility, improved taste, and increased stability. The present invention also provides novel glycosides of catechin compounds, which are obtained by the method of the present invention.
本发明提供了一种制备
黄酮类化合物的糖苷的方法,其中包括用具有糖基化活性并来自Trichoderma属(优选为Trichoderma viride或Trichoderma reesei)的
酶制剂处理
黄酮类化合物和糖基供体。这样的
黄酮类化合物包括
儿茶素化合物或其甲基化衍
生物,糖基供体包括含有
麦芽三糖残基的
碳水化合物(优选为
麦芽三糖、
麦芽四糖、
麦芽五糖、
麦芽六糖、
麦芽七糖、
糊精或
可溶性淀粉)。通过本发明获得的糖苷具有更高的
水溶性、改善的口感和增加的稳定性。本发明还提供了通过本发明的方法获得的
儿茶素化合物的新型糖苷。