(20R)-3β,20-dihydroxy-5α-cholest-9(11)-en-22-on-6α-yl O-(2,3,4-tri-O-benzoyl-β-D-fucopyranosyl)-(1→2)-(3,4-di-O-benzyl-6-deoxy-β-D-glucopyranosyl)-(1→4)-[(2,4-di-O-benzoyl-6-deoxy-3-O-methyl-β-D-glucopyranosyl)-(1→2)]-(3-O-benzoyl-β-D-xylopyranosyl)-(1→3)-2,4-di-O-benzoyl-6-deoxy-β-D-glucopyranoside 在
三氧化硫吡啶 作用下,
以
N,N-二甲基甲酰胺 、
甲醇 为溶剂,
反应 2.75h,
以86%的产率得到sodium salt of (20R)-20-hydroxy-3β-sulfooxy-5α-cholest-9(11)-en-22-on-6α-yl O-(2,3,4-tri-O-benzoyl-β-D-fucopyranosyl)-(1→2)-(3,4-di-O-benzyl-6-deoxy-β-D-glucopyranosyl)-(1→4)-[(2,4-di-O-benzoyl-6-deoxy-3-O-methyl-β-D-glucopyranosyl)-(1→2)]-(3-O-benzoyl-β-D-xylopyranosyl)-(1→3)-2,4-di-O-benzoyl-6-deoxy-β-D-glucopyranoside