Preparation of modified glycosyl glycerol derivatives by glycal rearrangement.

By Lewis acid catalysed allylic rearrangement reactions of various glycals with glycerol derivatives 2,3-unsaturated mono- and disaccharide glycosyl glycerol derivatives were obtained in good yields. A triglycosyl glycerol was successfully synthesized in a straightforward three step way from 3,4,6-tri-O-acetyl-1,5-anhydro-2-deoxy-D-arabino-hex-1-enitol.