1-[2-deoxy-5-O-(4,4’ (4,4’ -dimethoxytriphenylmethyl))-β-D-erythro-pentofuranosyl]-1,5-dihydro-6-(dimethylformamido)-3-(pent-1-yl)-4H-pyrazolo[3,4-d]-pyrimidin-4-one 、
双(二异丙基氨基)(2-氰基乙氧基)膦 在
diisopropylethylamine tetrazolium 作用下,
以
二氯甲烷 为溶剂,
反应 1.5h,
以87%的产率得到1-[2-deoxy-5-O-(4,4’ (4,4’ -dimethoxytriphenylmethyl))-β-D-erythro-pentofuranosyl]-1,5-dihydro-6-(dimethylformamido)-3-(pent-1-yl)-4H-pyrazolo[3,4-d]-pyrimidin-4-one 3’-(2-cyanoethyl-diisopropylphosphoramidite)