2-氰乙基N,N-二异丙基氯亚磷酰胺 、
7-[2-deoxy-5-O-(4,4'-dimethoxytriphenylmethyl)-β-D-erythro-pentofuranosyl]-N4-[(dimethylamino)methylidene]-5-ethynyl-7H-pyrrolo[2,3-d]pyrimidin-4-amine 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67%的产率得到7-[2-deoxy-5-O-(4,4'-dimethoxytriphenylmethyl)-β-D-erythro-pentofuranosyl]-N
4-[(dimethylamino)methylidene]-5-ethynyl-7H-pyrrolo[2,3-d]pyrimidin-4-amine 3'-(2-cyanoethyl diisopropylphosphoramidite)