[9-((2R,3R,4R,5R)-4-{2-[Dimethyl-(1,1,2-trimethyl-propyl)-silanyloxy]-ethoxy}-3-trityloxy-5-trityloxymethyl-tetrahydro-furan-2-yl)-9H-purin-6-yl]-trityl-amine                                                                                                                                                              在
                                                                                                                                                                                 
四丁基氟化铵                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 4.0h,
                                                                                                                以88%的产率得到2-{(2R,3R,4R,5R)-5-[6-(Trityl-amino)-purin-9-yl]-4-trityloxy-2-trityloxymethyl-tetrahydro-furan-3-yloxy}-ethanol