Patent ID: 8580538

Claim:
A method for producing an ethylenically unsaturated glycoside of formula I wherein n is 1, 2 or 3; A is C 2-20 alkylene or —R 6 —O—[—R 6 —O—] x —C 2-20 alkylene; X is selected from the group consisting of —O—, —NH— and —NR 5 —, R 3 is selected from the group consisting of —H, and C 1-10 alkyl; R 4 is selected from the group consisting of —H, —COOH and —COO − M + ; R 5 is C 1-10 alkyl; R 6 is —C 2 H 4 — or —C 3 H 6 —; M + is selected from the group consisting of Li + , Na + , K + and NH 4 + ; and x is an integer of from 0 to 200; comprising reacting an ethylenically unsaturated alcohol of formula II with a saccharide of formula III in the presence of a glucosidase (i) at a molar ratio of ethylenically unsaturated alcohol of formula II to saccharide of formula III of from 2:1 to 30:1; (ii) in the presence of a solvent mixture of water and 1,4-dioxane at a weight ratio of water to 1,4-dioxane of from 0.1:1 to 9:1; and (iii) at a weight ratio of solvent mixture to saccharide of from 3:1 to 30:1.