A process for the preparation of protoescigenin by hydrolysis of escin isolated from Aesculus hippocastanum. The process includes the following steps: a two-step hydrolysis first under acidic and then basic conditions, enrichment of the crude mixture of sapogenins with protoescigenin, an isolation of the mixture of sapogenins in a solid form, and a purification of the obtained solid and isolation of high purity protoescigenin. The invention also relates to protoescigenin monohydrate in a crystalline form and the preparation thereof. Protoescigenin is a polyhydroxy aglycone, which can be used as a synthon in the chemical modifications of naturally occurring saponins.
一种通过
水解从七叶树(Aesculus hippocastanum)中分离的马栗素(escin)制备原马栗素(protoescigenin)的方法。该方法包括以下步骤:首先在酸性和碱性条件下进行两步
水解,用原马栗素富集粗混合的
皂甙原料,将混合的
皂甙原料以固体形式分离,然后纯化所得的固体并分离高纯度的原马栗素。该发明还涉及以结晶形式制备的原马栗素单
水合物及其制备方法。原马栗素是一种多羟基的无糖苷基化合物,可用作天然
皂苷化合物的
化学修饰中的合成子。