2-氰乙基N,N-二异丙基氯亚磷酰胺 、
2-N-dimethylaminomethylene-2'-O-<1-(2-fluorophenyl)-4-methoxypiperidin-4-yl>-3'-O-(9-phenylxanthen-9-yl)guanosine 以
1,2-二氯乙烷 为溶剂,
反应 3.0h,
以82.9%的产率得到2-N-dimethylaminomethylene-2'-O-<1-(2-fluorophenyl)-4-methoxypiperidin-4-yl>-3'-O-(9-phenylxanthen-9-yl)guanosine 5'-O-(2-cyanoethyl N,N-diisopropylphosphoramidite)