Methanesulfonic acid (2R,3R,5S)-2-[(4-methoxy-phenyl)-diphenyl-methoxymethyl]-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-pyran-3-yl ester                                                                                                                                                              在
                                                                                                                                                                                 
叠氮化锂                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                    反应 16.0h,
                                                                                                                生成                                                 1,5-anhydro-2,3,4-trideoxy-6-O-monomethoxytrityl-2-(thymin-1-yl)-D-threohex-enose   、                                                                                             1,5-anhydro-4-azido-2,3,4-trideoxy-6-O-monomethoxytrityl-2-(thymin-1-yl)-D-arabinohexitol