5-methyl-2'-O,4'-C-(N-phenoxyacetylaminomethylene)uridine 、
双(二异丙基氨基)(2-氰基乙氧基)膦 在
4,5-二氰基咪唑 作用下,
以
乙腈 为溶剂,
反应 3.0h,
以85%的产率得到3-[[(1R,5R,7R,8S)-5-[[bis(4-methoxyphenyl)-phenylmethoxy]methyl]-7-(5-methyl-2,4-dioxopyrimidin-1-yl)-3-(2-phenoxyacetyl)-2,6-dioxa-3-azabicyclo[3.2.1]octan-8-yl]oxy-[di(propan-2-yl)amino]phosphanyl]oxypropanenitrile