(1R,5R,7R,8S)-8-hydroxy-5-hydroxymethyl-7-[N(6)-benzoyl-(adenin-9-yl)]-2-aza-2-N-trifluoroacetyl-6-oxabicyclo[3.2.1]octane 、
4,4'-双甲氧基三苯甲基氯 在
吡啶 作用下,
以83%的产率得到(1R,5R,7R,8S)-5-(4,4'-dimethoxytrityloxymethyl)-8-hydroxy-7-[N(6)-benzoyl-(adenin-9-yl)]-2-aza-2-N-trifluoroacetyl-6-oxabicyclo[3.2.1]octane