4-phenoxyacetylamino-1-[2-(2'deoxy-5'-O-(4,4'-dimethoxytrityl)-β-D-ribofuranosyl)ethyl]-2-(2-octylthioethyl)-6-oxopyrimidine 、
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63%的产率得到4-phenoxyacetylamino-1-[2-(2'deoxy-3'-N,N-diisopropylcyanoethylphosphoramidyl-5'-O-(4,4'-dimethoxytrityl)-β-D-ribofuranosyl)ethyl]-2-(2-octylthioethyl)-6-oxopyrimidine