Patent ID: 7897820

Claim:
A process for preparing Erianin, comprising the steps of: A1. reacting compound of general formula (I) with compound of general formula (II) by bonding reaction in inert solvent which contains alkali to form compound of general formula (III); A2. reacting compound (III) obtained in step A1 with hydrogen by hydrogenation reaction to form compound of general formula (IV) in organic solvent, with hydrogenation catalyst; and A3. removing the hydroxyl protecting group R of compound (IV) obtained in step A2 by hydroxy group deprotection reaction to form Erianin; Wherein, X is halogen selected from a group consisting of Cl, Br, or I; in step A1, said alkali is potassium t-butoxide; R is benzyl group, and when R is benzyl group, the protecting group is removed during hydrogenation reaction in step A2; the synthetic route is: