methyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl-(1->4)-3-O-acetyl-6-O-chloroacetyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl-(1->3)-2,4,6-tri-O-benzyl-β-D-galactopyranoside 在
2,6-二甲基吡啶 、
硫脲 作用下,
以
甲醇 、
二氯甲烷 为溶剂,
反应 16.0h,
以100%的产率得到methyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl-(1->4)-3-O-acetyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl-(1->3)-2,4,6-tri-O-benzyl-β-D-galactopyranoside