O-(2,6-Di-O-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)-<(2,3,4-tri-O-benzyl-α-L-fuco..)> 、
三氯乙腈 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
二氯甲烷 为溶剂,
反应 4.0h,
以73%的产率得到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)-<(2,3,4-tri-O-benzyl-α..)>