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    • 18. 发明授权
    • Sulfated C-glycoside, method for isolating same and method for synthesizing same
    • 硫酸化C-糖苷,其分离方法及其合成方法
    • US08367622B2
    • 2013-02-05
    • US13143111
    • 2009-12-25
    • Hitoshi Ishida
    • Hitoshi Ishida
    • A01N43/04A61K31/70C07H5/02C07H1/00C07H1/06C07H1/08
    • C07D407/04A61K36/82C07D493/14
    • Provided are a sulfated C-glycoside which is a novel compound serving as a precursor of chafuroside and chafuroside analogs; a method for efficiently producing the sulfated C-glycoside; and a method for efficiently producing chafuroside and chafuroside analogs using said sulfated C-glycoside. A sulfated C-glycoside represented by general formula (A1) or (B1) [wherein R1, R2 and R3 independently represent each a hydrogen atom or an OH group] is obtained by extracting tea leaves or tea tannins with water, a lower alcohol solvent having 1 to 3 carbon atoms or a liquid mixture comprising the same. Alternatively, the sulfated C-glycoside is produced by reacting a flavone C-glycoside such as isovitexin or vitexin with a sulfate group-introducing agent to thereby sulfate the flavone C-glycoside. By heating the sulfated C-glycoside thus obtained, chafuroside and chafuroside analogs are efficiently produced.
    • 提供一种硫酸化的C-糖苷,它是一种新的化合物,用作沙夫沙罗和沙夫罗内酯类似物的前体; 一种有效生产硫酸化C-糖苷的方法; 以及使用所述硫酸化C-糖苷有效生产沙非罗非和类胡萝卜素类似物的方法。 通过用水,低级醇溶剂萃取茶叶或茶单宁来获得由通式(A1)或(B1)表示的硫酸化C-糖苷[其中R 1,R 2和R 3各自独立地表示氢原子或OH基团] 具有1至3个碳原子或包含该碳原子的液体混合物。 或者,硫酸化C-糖苷通过使异黄酮苷或牡荆素等黄酮C糖苷与硫酸酯基导入剂反应从而硫酸化黄酮C-糖苷而制备。 通过加热由此获得的硫酸化的C-糖苷,可有效地制备沙夫罗辛和类胡萝卜素类似物。