5-[12-(diamantyl-4-oxyl)-(4,7,10-trioxadodec-1-ynyl)]-5'-O-(4,4'-dimethoxytrityl)-2'-deoxyuridine 、
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75%的产率得到5-[12-(diamantyl-4-oxyl)-(4,7,10-trioxadodec-1-ynyl)]-5'-O-(4,4'-dimethoxytrityl)-2'-deoxyuridine-3'-(cyanoethyl-N,N'-diisopropyl)phosphoramidite