O-(2-O-acetyl-3-O-allyl-4-O-benzyl-6-deoxy-β-D-glucopyranosyl) trichloroacetimidate 、
tert-butyldimethylsilyl O-(2,3,4-tri-O-benzyl-α-L-rhamnopyranosyl)-(1->2)-(4-O-benzyl-6-deoxy-β-D-glucopyranosyl)-(1->2)-3,4-di-O-benzyl-6-deoxy-β-D-glucopyranoside 在
三氟甲磺酸三甲基硅酯 、 4 A molecular sieve 作用下,
以
二氯甲烷 为溶剂,
反应 0.67h,
以85%的产率得到tert-butyldimethylsilyl O-(2-O-acetyl-3-O-allyl-4-O-benzyl-6-deoxy-β-D-glucopyranosyl)-(1->3)-<(2,3,4-tri-O-benzyl-α-L-rhamnopyranosyl)-(1->2)>-(4-O-benzyl-6-deoxy-β-D-glucopyranosyl)-(1->2)-3,4-di-O-benzyl-6-deoxy-β-D-glucopyranoside