2-(trimethylsilyl)ethyl N,N,N',N'-tetraisopropylphosphorodiamidite 、
(1-{(2R,4S,5R)-5-[Bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-hydroxy-tetrahydro-furan-2-yl}-2-oxo-1,2-dihydro-pyrimidin-4-yl)-carbamic acid 2-trimethylsilanyl-ethyl ester 在
二异丙基铵盐四氮唑 作用下,
以
二氯甲烷 为溶剂,
以90%的产率得到(1-{(2R,4S,5R)-5-[Bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-[diisopropylamino-(2-trimethylsilanyl-ethoxy)-phosphanyloxy]-tetrahydro-furan-2-yl}-2-oxo-1,2-dihydro-pyrimidin-4-yl)-carbamic acid 2-trimethylsilanyl-ethyl ester