8-methoxycarbonyloctyl 3-O-allyl-2,4-di-O-benzyl-6-O-(3,4-di-O-benzyl-α-D-mannopyranosyl)-β-D-mannopyranoside 、
3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl bromide 在
2,4,6-三甲基吡啶 、 4 A molecular sieve 、
silver trifluoromethanesulfonate 作用下,
以
二氯甲烷 为溶剂,
以53%的产率得到8-methoxycarbonyloctyl O-<3,4-di-O-benzyl-2,6-di-O-(3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl)-α-D-mannopyranosyl>-(1->6)-3-O-allyl-2,4-di-O-benzyl-β-D-mannopyranoside