3-[1-N-(4-N-fluorenylmethyloxycarbonyl)piperazino]propionic acid 、
[(1R,3R,4R,7S)-1-(4,4′-dimethoxytrityloxymethyl)-7-hydroxy-3-(thymin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane] 在
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 1.17h,
以84%的产率得到(1R,3R,4R,7S)-1-(4,4’-dimethoxytrityloxymethyl)-7-hydroxyl-5-N-{3-[1-N-(4-N-fluorenylmethyloxycarbonyl)piperazino]propanoyl}-3-(thymin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane