Abstract
As one of the processes for preparation of hesperetin 7-glucoside, partial hydrolysis of 3′-ethoxycarbonylhesperidin (III) or acetylhesperidin (IV) was carried out. Boiling of (III) in ethanol solution with sodium acetate resulted in liberation of the ethoxycarbonyl group and ethanolic solution of hesperidin was obtained. Partial hydrolysis was effect by heating this ethanolic solution or ethanolic solution of (IV) with hydrochloric acid for about 1 hour, affording (I), m. p. 204.5-205.5°, in ca. 15% yield.
