1-((2R,3r,4r,5r)-5-((双(4-甲氧基苯基)(苯基)甲氧基)甲基)-4-羟基-3-甲氧基四氢呋喃-2-基)嘧啶-2,4(1h,3h)-二酮 、
S-pivaloyl-2-thioethyl di(N,N-diisopropylamino)phosphoramidite 在
S-ethylthiotetrazole 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
以85.4%的产率得到S-(2-(((((2R,3R,4R,5R)-2-((bis(4-methoxyphenyl)(phenyl)methoxy)methyl)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-methoxytetrahydrofuran-3-yl)oxy)(diisopropylamino)phosphaneyl)oxy)ethyl) 2,2-dimethylpropanethioate