allyl (3-O-acetyl-2-deoxy-4,6-O-isopropylidene-2-trichloroacetamido-β-D-glucopyranosyl)-(1->2)-[2,3,4,6-tetra-O-benzyl-α-D-glucopyranosyl-(1->3)]-(4-O-benzyl-α-L-rhamnopyranosyl)-(1->2)-3,4-di-O-benzyl-α-L-rhamnopyranoside 在
甲醇 、
potassium carbonate 作用下,
以92%的产率得到allyl (2-deoxy-4,6-O-isopropylidene-2-trichloroacetamido-β-D-glucopyranosyl)-(1→2)-[2,3,4,6-tetra-O-benzyl-α-D-glucopyranosyl-(1→3)]-(4-O-benzyl-α-L-rhamnopyranosyl)-(1→2)-3,4-di-O-benzyl-α-L-rhamnopyranoside