(1R,3R,4R,5R,7S)-3-(N6-benzoyladenin-9-yl)-1-(4,4'-dimethoxytrityoxy)methyl-5-methyl-7-hydroxy-2-oxabicyclo[2.2.1]heptane 、
2-氰乙基N,N-二异丙基氯亚磷酰胺 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
以81%的产率得到(1R,3R,4R,5R,7S)-3-(N6-benzoyladenin-9-yl)-7-(2-cyanoethoxydiisopropylaminophosphinoxy)-1-(4,4'-dimethoxytrityloxy)methyl-5-methyl-2-oxabicyclo[2.2.1]heptane