2'-deoxy-5'-O-(4,4'-dimethoxytrityl)-N4-{[2-(4-nitrophenyl)ethoxy]carbonyl}cytidine 3'-(hydrogen butanedioate) 、 2'-deoxy-5'-O-(4,4'-dimethoxytrityl)-N
4-{[2-(4-nitrophenyl)ethoxy]carbonyl}cytidine 3'-(2'-cyanoethyl N,N,diisopropylphosphoramidite) 、 2'-deoxy-5'-O-(4,4'-dimethoxytrityl)-N
2-[2-(4-nitrophenyl)ethoxycarbonyl]-O
6-[2-(4-nitrophenyl)ethyl]guanosine 3'-(2-cyanoethyl diisopropylphosphoramidite) 在
N,N'-二甲基-1,6-己二胺 、 phenyl 1H-tetrazole-1-carboxylate 作用下,
以
二氯甲烷 为溶剂,
以89.3%的产率得到5'-d((fluorescein-labelledC)CCGGCCCGC)-3'