8-methoxycarbonyloctyl 2,3,4-tri-O-benzyl-6-O-<2,3,4-tri-O-benzyl-6-O-(3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl)-α-D-mannopyranosyl>-β-D-mannopyranoside 、
2-O-acetyl-3-O-allyl-4,6-di-O-benzyl-α-D-galactopyranosyl bromide 在
2,4,6-三甲基吡啶 、 4 A molecular sieve 、
silver trifluoromethanesulfonate 作用下,
以
二氯甲烷 、
甲苯 为溶剂,
反应 0.5h,
以69.9%的产率得到8-methoxycarbonyloctyl 6-O-<6-O-<4-O-(2-O-acetyl-3-O-allyl-4,6-di-O-benzyl-β-D-galactopyranosyl)-3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl>-2,3,4-tri-O-benzyl-α-D-mannopyranosyl>-2,3,4-tri-O-benzyl-β-D-mannopyranoside