3,6-di-O-acetyl-2-deoxy-2-phthalimido-4-O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-β-D-glucopyranosyl bromide 、
benzyl 3,4,6-tri-O-benzyl-2-O-(2,4-di-O-benzyl-α-D-mannopyranosyl)-α-D-mannopyranoside 在
2,4,6-三甲基吡啶 、 3 A molecular sieve 、
silver trifluoromethanesulfonate 作用下,
以
二氯甲烷 为溶剂,
以39%的产率得到benzyl 3,4,6-tri-O-benzyl-2-O-(2,4-di-O-benzyl-3,6-di-O-<3,6-di-O-acetyl-2-deoxy-2-phthalimido-4-O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-β-D-glucopyranosyl>-α-D-mannopyranosyl)-α-D-mannopyranoside