3,6-bis(phenylethynyl)pyrene-1-carboxylic acid 、
[(1R,3R,4R,7S)-1-(4,4′-dimethoxytrityloxymethyl)-7-hydroxy-3-(thymin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane] 在
O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
1,1-二氯乙烷 、
N,N-二甲基甲酰胺 为溶剂,
以262 mg的产率得到(1R,3R,4R,7S)-1-(4,4'-dimethoxytrityloxymethyl)-7-hydroxy-5-[3,6-bis(phenylethynyl)pyren-1-carbonyl]-3-(thymin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane