2-N,N-bis(t-butyloxycarbonyl)amino-5-{4-[(t-butyldiphenylsilyl)oxy]but-1-yl}-3,8-di(t-butyloxycarbonyl)-4-oxo-5,6,7,8-tetrahydropyrido[2,3-d]pyrimidine                                                                                                                                                              在
                                                                                                                                                                                 
四丁基氟化铵                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                以83%的产率得到2-N,N-bis(t-butyloxycarbonyl)amino-8-(t-butyloxycarbonyl)-4-hydroxy-5-(4-hydroxybut-1-yl)-5,6,7,8-tetrahydropyrido[2,3-d]pyrimidine