tert-Butyldimethylsilyl O-(2,6-Di-O-benzyl-β-D-galactopyranosyl)-(1->4)-<(2,3,4-tri-O-benzyl-α-L-fucopyranosyl)-(1->3)>-2-azido-6-O-benzyl-2-deoxy-β-D-glucopyranoside 、 O-(2,6-Di-O-benzyl-3,4-O-isopropylidene-β-D-galactopyranosyl)-(1->4)-<(2,3,4-tri-O-benzyl-α-L-fucopyranosyl)-(1->3)>-2-azido-6-O-benzyl-2-deoxy-α/β-D-glucopyranosyl Trichloroacetimidate 在
三氟化硼乙醚 作用下,
以
正己烷 、
二氯甲烷 为溶剂,
反应 2.0h,
以81%的产率得到tert-Butyldimethylsilyl-O-(2,6-Di-O-benzyl-3,4-O-isopropylidene-β-D-galactopyranosyl)-(1->4)-<(2,3,4-tri-O-benzyl-α-L-fucopyranosyl)-(1->3)>-(2-azido-6-O-benzyl-2-deoxy-β-D-glucopyranosyl)-(1->3)-(2,6-di-O-benzyl-β-D-galactopyranosyl)-(1->4)-...