N-[5-Bromo-7-((2R,4S,5R)-4-hydroxy-5-hydroxymethyl-tetrahydro-furan-2-yl)-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-2-yl]-isobutyramide                                                                                                                                                              在
                                                                                                                                                                                 
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,3S,5R)-2-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-5-(5-bromo-2-isobutyrylamino-4-oxo-3,4-dihydro-pyrrolo[2,3-d]pyrimidin-7-yl)-tetrahydro-furan-3-yl ester 2-cyano-ethyl ester