6-N-[(di-n-butylamino)methylene]-3'-{[N-(9-fluorenyl)methoxycarbonyl-L-alanyl]amino}-3'-deoxy-5'-O-(4,4'-dimethoxytrityl)-β-D-adenosine 、
adipic acid bis(pentafluorophenyl)ester 在
吡啶 、
4-二甲氨基吡啶 作用下,
反应 2.0h,
以66%的产率得到6-N-[(di-n-butylamino)methylene]-3'-{[N-(9-fluorenyl)methoxycarbonyl-L-alanyl]amino}-3'-deoxy-5'-O-(4,4'-dimethoxytrityl)-2'-O-[1,6-dioxo-6-(pentafluorophenyloxy)hexyl]-β-D-adenosine