2-氰乙基N,N-二异丙基氯亚磷酰胺   、                                                                                      
N-(9-{(2R,4S,5R)-5-[Bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-hydroxy-tetrahydro-furan-2-yl}-6-thiophen-2-yl-9H-purin-2-yl)-2-phenoxy-acetamide                                                                                                                                                                                                                                                                                                          以88%的产率得到Diisopropyl-phosphoramidous acid (2R,3S,5R)-2-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-5-[2-(2-phenoxy-acetylamino)-6-thiophen-2-yl-purin-9-yl]-tetrahydro-furan-3-yl ester 2-cyano-ethyl ester