N-{9-[(4aR,6R,7R,7aR)-2,2-Di-tert-butyl-7-(2-trimethylsilanyl-ethoxymethoxy)-tetrahydro-furo[3,2-d][1,3,2]dioxasilin-6-yl]-6-oxo-6,9-dihydro-1H-purin-2-yl}-2-phenyl-acetamide                                                                                                                                                              在
                                                                                                                                                                                 
氢氟酸   、                                                                                                  
N,N-二异丙基乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
吡啶   、                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 0.5h,
                                                                                                                生成                                                 Diisopropyl-phosphoramidous acid (2R,3R,4R,5R)-2-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-5-(6-oxo-2-phenylacetylamino-1,6-dihydro-purin-9-yl)-4-(2-trimethylsilanyl-ethoxymethoxy)-tetrahydro-furan-3-yl ester 2-cyano-ethyl ester