[(2R,3R,4R,5R)-2-[[(benzylamino)-[2-(2,2-dimethyl-3-trityloxypropanoyl)sulfanylethoxy]phosphoryl]oxymethyl]-5-[4-[[bis(4-methoxyphenyl)-phenylmethyl]amino]-2-oxopyrimidin-1-yl]-4-hydroxy-4-methyloxolan-3-yl] (2S)-3-methyl-2-[(2-methylpropan-2-yl)oxycarbonylamino]butanoate                                                                                                                                                              在
                                                                                                                                                                                 
三氟乙酸   、                                                                                                  
甲醇                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 2.55h,
                                                                                                                以48%的产率得到[(2R,3R,4R,5R)-5-(4-amino-2-oxopyrimidin-1-yl)-2-[[(benzylamino)-[2-(3-hydroxy-2,2-dimethylpropanoyl)sulfanylethoxy]phosphoryl]oxymethyl]-4-hydroxy-4-methyloxolan-3-yl] (2S)-2-amino-3-methylbutanoate