1-[2-deoxy-5-O-(4,4'-dimethoxytrityl)-β-D-erythropentofuranosyl]-4-{[(N,N-dimethylamino)methylidene]amino}-3-(octa-1,7-diyn-1-yl)-1H-pyrazolo[3,4-d]pyrimidine 、
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 0.5h,
以74%的产率得到1-[2-deoxy-5-O-(4,4'-dimethoxytrityl)-β-D-erythropentofuranosyl]-4-{[(N,N-dimethylamino)methylidene]amino}-3-(octa-1,7-diyn-1-yl)-1H-pyrazolo[3,4-d]pyrimidin-3'-(2-cyanoethyl)-N,N-diisopropylphosphoramidite