Patent ID: 8486664

Claim:
A method for producing an ethylenically unsaturated glycoside of formula I wherein Y and Y′ are independently H, or a monosaccharide or a linear or branched oligosaccharide comprising from 2 to 12 monosaccharide units, wherein at least one of Y and Y′ is other than H; m is an integer of from 0 to 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 compound of formula II with a polysaccharide comprising 10 or more monosaccharide units in the presence of a glycosidase or a glycosyltransferase.