Preparation method of trihydroxyethyl rutoside
AssigneeJinan Xinlite Technology Co., Ltd.
InventorsSi LI, Xutong LIANG, Dapeng LI
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Abstract
The present invention relates to a preparation method of trihydroxyethyl rutoside. In the method, rutin is firstly prepared into 7-monohydroxyethyl rutoside with a purity of greater than or equal to 98% by weight, and then 7-monohydroxyethyl rutoside is hydroxyethylated to give troxerutin having less than 2% of non-hydroxyethylated rutoside derivatives. The amount of 7,3′,4′-trihydroxyethyl rutoside in troxerutin is more than 80% by weight. The product is further purified so that 7,3′,4′-trihydroxyethyl rutoside with a purity of greater than or equal to 98% by weight could be obtained.
Claims10
A preparation method of trihydroxyethyl rutoside, characterized by that 7-monohydroxyethyl rutoside is first prepared by ethylation of rutin, purified thereafter, and then converted to trihydroxyethyl rutoside by hydroxyethylation.
Dependencies are inferred from the claim text.