5'-O-(4,4'-dimethoxytrityI)-2'-cyanoethylselenyl-2'-deoxyuridine 、
双(二异丙基氨基)(2-氰基乙氧基)膦 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
生成 1-[2'-deoxy-3'-O-(2-cyanoethyl-N,N-diisopropylamino)-phosphoramidite-5'-O-(4,4'-dimethoxytrityl)-β-D-erythro-ribofuranosyl]-2-cyanoethyIselenyluridine 、 1-[2'-deoxy-3'-O-(2-cyanoethyl-N,N-diisopropylamino)-phosphoramidite-5'-O-(4,4'-dimethoxytrityl)-β-D-erythro-ribofuranosyl]-2-cyanoethyIselenyluridine