[(2R,3R,4R,5R)-2-[2-[[(2R,3R,4R,5R)-4-acetyloxy-5-(6-benzamidopurin-9-yl)-2-(2-bromoethyl)oxolan-3-yl]methylsulfonyl]ethyl]-4-benzoyloxy-5-(2,4-dioxopyrimidin-1-yl)oxolan-3-yl]methyl benzoate 、
S-[[(2R,3S,4R,5R)-5-(4-benzamido-2-oxopyrimidin-1-yl)-2-[2-[[(2R,3S,4R,5R)-2-[2-[tert-butyl(diphenyl)silyl]oxyethyl]-5-(2,4-dioxopyrimidin-1-yl)-4-hydroxyoxolan-3-yl]methylsulfonyl]ethyl]-4-hydroxyoxolan-3-yl]methyl] ethanethioate 在
caesium carbonate 作用下,
以
四氢呋喃 为溶剂,
生成