allyl (3,4-di-O-benzyl-2-O-levulinoyl-α-L-rhamnopyranosyl)-(1→3)-(2-O-acetyl-4-O-benzyl-α-L-rhamnopyranosyl)-(1→3)-(2-deoxy-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 、
sodium methylate 作用下,
以
甲醇 为溶剂,
反应 1.0h,
以92%的产率得到allyl (3,4-di-O-benzyl-2-α-L-rhamnopyranosyl)-(1→3)-(4-O-benzyl-α-L-rhamnopyranosyl)-(1→3)-(2-deoxy-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