O-(2,3,4-Tri-O-benzyl-6-deoxy-β-D-glucopyranosyl)-(1-2)-(3,4,6-tri-O-benzyl-β-D-galactopyranosyl)-(1-4)-<(2,3,4-tri-O-benzyl-6-deoxy-β-D-glucopyranosyl)-(1-2)>-3-O-benzyl-α/β-D-xylopyranosyl trichloroacetimidate 、
tert-Butyldimethylsilyl 2,4-Di-O-acetyl-6-deoxy-β-D-glucopyranoside 在
4 A molecular sieve 、
三氟化硼乙醚 作用下,
以
二氯甲烷 为溶剂,
反应 4.0h,
以34%的产率得到tert-Butyldimethylsilyl O-(2,3,4-tri-O-benzyl-6-deoxy-β-D-glucopyranosyl)-(1-2)-(3,4,6-tri-O-benzyl-β-D-galactopyranosyl)-(1-4)-<(2,3,4-tri-O-benzyl-6-deoxy-β-D-glucopyranosyl)-(1-2)>-3-O-benzyl-β-D-xylopyranosyl-(1-3)-2,4-di-O-acetyl-6-deoxy-β-D-g