5'-O-(4,4'-dimethoxytrityl)-2'-O-pivaloyloxymethyl-N6-phenoxyacetyl-adenosine 、
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,
以79%的产率得到N6-phenoxyacetyl-2'-O-pivaloyloxymethyl-5'-O-(4,4'-dimethoxytrityl)adenosine 3'-O-(2-cyanoethyl N,N-diisopropylphosphoramidite)