methyl O-(6-O-tert-butyldiphenylsilyl-β-D-galactopyranosyl-1->4)-O-(2-acetamido-3,6-di-O-benzyl-2-deoxy-β-D-glucopyranosyl)-(1->3)-2,4,6-tri-O-benzyl-β-D-galactopyranoside 、
2,2-二甲氧基丙烷 在
对甲苯磺酸 作用下,
以
丙酮 为溶剂,
反应 6.0h,
以63%的产率得到methyl O-(6-O-tert-butyldiphenylsilyl-3,4-O-isopropylidene-β-D-galactopyranosyl-1->4)-O-(2-acetamido-3,6-di-O-benzyl-2-deoxy-β-D-glucopyranosyl)-(1->3)-2,4,6-tri-O-benzyl-β-D-galactopyranoside