2-[2-acetyloxyethoxy-[(2R,3R,4R,5R)-5-[[[(2R,3R,4R,5R)-4-[bis(2-acetyloxyethoxy)methoxy]-5-[4-[[bis(4-methoxyphenyl)-phenylmethyl](15N)amino]-2-oxo(315N)pyrimidin-1-yl]-2-[[cyclododecyloxy-bis(trimethylsilyloxy)silyl]oxymethyl]oxolan-3-yl]oxy-methoxyphosphoryl]oxymethyl]-2-[4-[[bis(4-methoxyphenyl)-phenylmethyl](15N)amino]-2-oxo(315N)pyrimidin-1-yl]-4-hydroxyoxolan-3-yl]oxymethoxy]ethyl acetate 、
N,N,N,N-四异丙基二氨基磷酸甲酯 在
四氮唑 作用下,
以
二氯甲烷 为溶剂,
反应 11.0h,
以51%的产率得到2-[2-acetyloxyethoxy-[(2R,3R,4R,5R)-4-[[(2R,3R,4R,5R)-4-[bis(2-acetyloxyethoxy)methoxy]-5-[4-[[bis(4-methoxyphenyl)-phenylmethyl](15N)amino]-2-oxo(315N)pyrimidin-1-yl]-3-[[di(propan-2-yl)amino]-methoxyphosphanyl]oxyoxolan-2-yl]methoxy-methoxyphosphoryl]oxy-2-[4-[[bis(4-methoxyphenyl)-phenylmethyl](15N)amino]-2-oxo(315N)pyrimidin-1-yl]-5-[[cyclododecyloxy-bis(trimethylsilyloxy)silyl]oxymethyl]oxolan-3-yl]oxymethoxy]ethyl acetate