[(2R,3R,4R,5R)-5-(6-benzamidopurin-9-yl)-3,4-bis[[[(2R,3R,4R,5R)-3,4-bis[[tert-butyl(dimethyl)silyl]oxy]-5-(2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methoxy-methoxyphosphoryl]oxy]oxolan-2-yl]methyl [(2R,3R,4R,5R)-4-[tert-butyl(dimethyl)silyl]oxy-5-(2,4-dioxopyrimidin-1-yl)-2-[[(4-methoxyphenyl)-diphenylmethoxy]methyl]oxolan-3-yl] methyl phosphate 在
苯磺酸 作用下,
以
乙腈 为溶剂,
反应 0.08h,
以95%的产率得到[(2R,3R,4R,5R)-5-(6-benzamidopurin-9-yl)-3,4-bis[[[(2R,3R,4R,5R)-3,4-bis[[tert-butyl(dimethyl)silyl]oxy]-5-(2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methoxy-methoxyphosphoryl]oxy]oxolan-2-yl]methyl [(2R,3R,4R,5R)-4-[tert-butyl(dimethyl)silyl]oxy-5-(2,4-dioxopyrimidin-1-yl)-2-(hydroxymethyl)oxolan-3-yl] methyl phosphate