3,4,6-tri-O-acetyl-2-acetamido-2-deoxy-α-D-mannopyranosyl-(1→2)-[2,3,4-tri-O-benzoyl-α-L-rhamnopyranosyl-(1→3)-]4-O-benzoyl-α-L-rhamnopyranosyl trichloroacetimidate 、
p-methoxyphenyl 3-O-acetyl-4-O-benzoyl-2-acetamido-2-deoxy-β-D-glucopyranosyl-(1→3)-2,4-di-O-acetyl-α-L-rhamnopyranoside 在
三氟甲磺酸三甲基硅酯 作用下,
以69%的产率得到p-methoxyphenyl 3,4,6-tri-O-acetyl-2-acetamido-2-deoxy-α-D-mannopyranosyl-(1→2)-[2,3,4-tri-O-benzoyl-α-l-rhamnopyranosyl-(1→3)-]4-O-benzoyl-α-L-rhamnopyranosyl-(1→4)-3-O-acetyl-4-O-benzoyl-2-acetamido-2-deoxy-β-D-glucopyranosyl-(1→3)-2,4-di-O-acetyl-α-L-rhamnopyranoside