2-氰乙基N,N-二异丙基氯亚磷酰胺 、
3-bromo-1-[2-deoxy-5-O-(4,4'-dimethoxytrityl)-β-D-erythro-pentofuranosyl]-N4,N6-bis(2-methylpropanoyl)-1H-pyrazolo[3,4-d]pyrimidine-4,6-diamine 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65%的产率得到3-bromo-1-[2-deoxy-5-O-(4,4'-dimethoxytrityl)-β-D-erythro-pentofuranosyl]-N
4,N
6-bis(2-methylpropanoyl)-1H-pyrazolo[3,4-d]pyrimidine-4,6-diamine 3'-(2-cyanoethyl diisopropylphosphoramidite)