2-氰乙基N,N-二异丙基氯亚磷酰胺 、
5'-O-(4,4'-dimethoxytrityl)-N4-[trans-4-(2-{[2-bis(ethoxycarbonylmethylamino)ethyl]ethoxycarbonylmethylamino}acetylamino)cyclohexyl]-2'-deoxycytidine 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
以93%的产率得到5'-O-(4,4'-dimethoxytrityl)-N
4-[trans-4-(2-{[2-bis(ethoxycarbonylmethylamino)ethyl]ethoxycarbonylmethylamino}acetylamino)cyclohexyl]-2'-deoxycytidine-3'-O-(2-cyanoethyl)-N,N-diisopropylphosphoramidite