The paper describes the regioselective esterification of a glucopyranoside and glucose derivative with 11-methacryloylaminoundecanoic acid in the presence of a lipase from Candida antarctica. The obtained modified sugar derivatives 6-O-(11-methacryloylaminoundecanoyl)-1-O-methyl-alpha-D-glucopyranoside (3a) and 6-O-(11-methacryloylaminoundecanoyl)-3-O-methyl-alpha-D-gluco-pyranose (3b) were polymerized radically with AIBN as initiator.