chloro(diethylamino)<2-(4-nitrophenyl)ethoxy>phosphine   、                                                                                      
N3-<(tert-butyloxy)carbonyl>-5'-O-(2-dansylethoxycarbonyl)-2'-O-(tetrahydro-4-methoxy-2H-pyran-4-yl)uridine                                                                                                                                                              在
                                                                                                                                                                                 
N,N-二异丙基乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 1.5h,
                                                                                                                以64%的产率得到N
3-(tert-butyloxycarbonyl)-5'-O-(2-dansylethoxycarbonyl)-2'-O-(tetrahydro-4-methoxy-2H-pyran-4-yl)uridine 3'-<2-(4-nitrophenyl)ethyl N,N-diethylphosphoramidite>