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