N-(1-{[7-(diethylamino)-2-oxo-2H-chromen-4-yl]-methoxy}-2,2,6,6-tetramethylpiperidin-4-yl)-5'-O-(4,4'-dimethoxytrityl)-2'-deoxycytidine 、
2-氰乙基N,N-二异丙基氯亚磷酰胺 在
三乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 21.0h,
以71%的产率得到3-[[(2R,3S,5R)-2-[[bis(4-methoxyphenyl)-phenylmethoxy]methyl]-5-[4-[[1-[[7-(diethylamino)-2-oxochromen-4-yl]methoxy]-2,2,6,6-tetramethylpiperidin-4-yl]amino]-2-oxopyrimidin-1-yl]oxolan-3-yl]oxy-[di(propan-2-yl)amino]phosphanyl]oxypropanenitrile