Five disaccharides related in structure to the glycans of vertebrate mucins have been chemically synthesized using orthogonal blocking, coupling and deblocking techniques. These include 2-naphthylmethyl 3, 4, 6-tetra-O-acetyl-β-d-galactopyranosyl-(1→ 4)-2- acetamido-3, 6-di-O-acetyl-2-deoxy-β-d-glucopyranoside (6), 2-naphthylmethyl 2-acetamido- 3, 4, 6-tri-O-acetyl-2-deoxy-β-d-glucopyranosyl-(1→ 3)-2, 4, 6-tri-O-acetyl-β-d- ...