双(二异丙基氨基)(2-氰基乙氧基)膦 、
6-(N,N-diphenylcarbamoyl)oxy-1-[2-deoxy-5-O-(4,4'-dimethoxytrityl)-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 为溶剂,
反应 0.5h,
以68%的产率得到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]