benzyl O-(2,4,6-tri-O-benzyl-β-D-glucopyranosyl)-(1-4)-O-(2,3,6-tri-O-benzyl-β-D-glucopyranosyl)-(1-4)-2,3,6-tri-O-benzyl-β-D-glucopyranoside 、
2,3,4,6-四乙酰氧基-alpha-D-吡喃葡萄糖溴化物 在
silver trifluoromethanesulfonate 4 A molecular sieve 作用下,
以
1,2-二氯乙烷 为溶剂,
反应 1.0h,
以83%的产率得到benzyl O-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)-(1-3)-O-(2,4,6-tri-O-benzyl-β-D-glucopyranosyl)-(1-4)-O-(2,3,6-tri-O-benzyl-β-D-glucopyranosyl)-(1-4)-2,3,6-tri-O-benzyl-β-D-glucopyranoside