[(3aS,5R,6aS)-5-[[tert-butyl(diphenyl)silyl]oxymethyl]-2,2-dimethyl-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]dioxol-6-yl]oxy-phenoxy-methanethione   、                                                                                      
三(三甲基硅基)硅烷                                                                                                                                                              在
                                                                                                                                         
偶氮二异丁腈                                                                                                                                                                                                                               氮   、                                                                                                  silica gel   、                                                                                                  
乙酸乙酯   、                                                                                                  petroleum ether   、                                                                                                  
5-O-tert-butyldiphenylsilyl-3-deoxy-1,2-O-isopropylidene-β-D-threo-pentofuranose                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                以to afford 11 g of [(3aS,5S,6aS)-2,2-dimethyl-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]dioxol-5-yl]methoxy-tert-butyl-diphenyl-silane (compound 25d)的产率得到5-O-tert-butyldiphenylsilyl-3-deoxy-1,2-O-isopropylidene-β-D-threo-pentofuranose