5'-O-(4,4'-dimethoxytrityl)-N6-[(dimethylamino)methylidene]-O2'-(diphenylcarbamoyl)-2'-deoxy-isoguanosine 、
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 1.0h,
以76%的产率得到5'-O-(4,4'-dimethoxytrityl)-N6-[(dimethylamino)methylidene]-O2-(diphenylcarbamoyl)-2'-deoxy-isoguanosine-3'-O-(2-cyanoethyl-N,N'-diisopropylphosphoramidite)