benzyl 2-acetamido-6-O-acetyl-4-O-(6-O-acetyl-β-D-galactopyranosyl)-2-deoxy-β-D-glucopyranoside 、
2,2-二甲氧基丙烷 在
对甲苯磺酸 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 1.0h,
以65.3%的产率得到Acetic acid (3aS,4R,6S,7R,7aR)-6-((2R,3S,4R,5R,6R)-2-acetoxymethyl-5-acetylamino-6-benzyloxy-4-hydroxy-tetrahydro-pyran-3-yloxy)-7-hydroxy-2,2-dimethyl-tetrahydro-[1,3]dioxolo[4,5-c]pyran-4-ylmethyl ester