2-氰乙基N,N-二异丙基氯亚磷酰胺   、                                                                                      
(1-{(2R,4S,5R)-5-[Bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-hydroxy-tetrahydro-furan-2-yl}-6,7-dimethyl-2-oxo-1,2-dihydro-pteridin-4-yl)-carbamic acid 2-(4-nitro-phenyl)-ethyl ester                                                                                                                                                              在
                                                                                                                                                                                 
四氮唑                                                                                                                                  作用下,
                                                                                                                                                                                                                            以78%的产率得到(1-{(2R,4S,5R)-5-[Bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-[(2-cyano-ethoxy)-diisopropylamino-phosphanyloxy]-tetrahydro-furan-2-yl}-6,7-dimethyl-2-oxo-1,2-dihydro-pteridin-4-yl)-carbamic acid 2-(4-nitro-phenyl)-ethyl ester