1-[(2R,4S,5S)-5-{[bis(4-methoxyphenyl)(phenyl)methoxy]methyl}-4-(4-{(2R,3S,5R)-3-hydroxy-5-[5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl]tetrahydrofuran-2-yl}-1H-1,2,3-triazol-1-yl)tetrahydrofuran-2-yl]-5-methylpyrimidine-2,4(1H,3H)-dione 、
2-氰乙基N,N-二异丙基氯亚磷酰胺 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以49%的产率得到(2R,3S,5R)-2-({1-[(2S,3S,5R)-2-{[bis(4-methoxyphenyl)(phenyl)methoxy]methyl}-5-[5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl]tetrahydrofuran-3-yl]}-1H-1,2,3-triazol-4-yl)-5-[5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl]tetrahydrofuran-3-yl 2-cyanoethyl diisopropylphosphoramidite