乙酸酐 、
1-[6-hydroxy-5-tert-butyldimethylsilyloxymethyl-2,2-dimethyl-(3aR,5R,6R,6aR)-perhydrofuro[2,3-d][1,3]dioxol-6-yl]-4-(4-methoxybenzyloxy)-(1S,2R)-butane-1,2-diol 在
4-二甲氨基吡啶 、
三乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以50%的产率得到1-[5-tert-butyldimethylsilyloxymethyl-2,2-dimethyl-6-methylcarbonyloxy-(3aR,5R,6S,6aR)-perhydrofuro[2,3-d][1,3]dioxol-6-yl]-4-(4-methoxybenzyloxy)-2-methylcarbonyloxy-(1S,2R)-butyl acetate