6-(N,N-diphenylcarbamoyl)oxy-1-(2-deoxy-β-D-erythro-pentofuranosyl)-1H-pyrazolo[3,4-d]pyrimidine 在
N,N-二异丙基乙胺 作用下,
以
四氢呋喃 、
吡啶 为溶剂,
反应 2.0h,
生成 6-(N,N-diphenylcarbamoyl)oxy-1-[2-deoxy-5-O-(4,4'-dimethoxytrityl)-β-D-erythro-pentofuranosyl]-1H-pyrazolo[3,4-d]pyrimidine 3'-[(2-cyanoethyl)-N,N-diisopropylphosphoramidite]