benzyl O-(2-O-benzyl-4,6-O-isopropylidene-β-D-galactopyranosyl)-(1->4)-2,3,6-tri-O-benzyl-β-D-glucopyranoside 、 O-(2,3,4-tri-O-benzyl-α-L-fucopyranosyl)-(1<*>4)-O-<(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-(1<*>3)>-2-azido-6-O-benzyl-2-deoxy-α-D-glucopyranosyl trichloroacetimidate 在
4 A molecular sieve 、
三氟化硼乙醚 作用下,
以
正己烷 、
二氯甲烷 为溶剂,
以61%的产率得到benzyl O-(2,3,4-tri-O-benzyl-α-L-fucopyranosyl)-(1-*4)-O-<(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-(1<*>3)>-(2-azido-6-O-benzyl-2-deoxy-β-D-glucopyranosyl)-(1<*>3)-O-(2-O-benzyl-4,6-O-isopropylidene-β-D-galactopyranosyl)-(1<*>4)-2,3,6-tri-O-ben