Cyclo-glycosylation of (2,3,6-tri-O-benzyl-beta-D-galactopyranosyl)-{(1-->4)-(2,3,6-tri-O-benzyl-beta-D-glucopyranosyl) -(1-->4)-(2,3,6-tri-O-benzyl-alpha-D-galactopyranosyl))2-(1-->4)-(2,3,6-tri-O-benzyl-alpha/beta-glucopyranosyl fluoride and subsequent deprotection of the product gave an excellent yield of cyclo-lactohexaose.