[(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]-5-(4-benzamido-2-oxopyrimidin-1-yl)-4-benzoyloxyoxolan-3-yl]methyl benzoate 、 N-[9-[(2R,3R,4S,5R)-5-[2-[[(2R,3S,4R,5R)-2-[2-[tert-butyl(diphenyl)silyl]oxyethyl]-5-(2,4-dioxopyrimidin-1-yl)-4-hydroxyoxolan-3-yl]methylsulfonyl]ethyl]-3-hydroxy-4-(sulfanylmethyl)oxolan-2-yl]-6-[2-(4-nitrophenyl)ethoxy]purin-2-yl]-2-methylpropanamide 在
caesium carbonate 作用下,
以
四氢呋喃 为溶剂,
反应 2.0h,
生成 [(2R,3R,4R,5R)-2-[2-[[(2R,3R,4R,5R)-4-acetyloxy-5-(6-benzamidopurin-9-yl)-2-[2-[[(2R,3S,4R,5R)-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-hydroxy-5-[2-(2-methylpropanoylamino)-6-[2-(4-nitrophenyl)ethoxy]purin-9-yl]oxolan-3-yl]methylsulfanyl]ethyl]oxolan-3-yl]methylsulfonyl]ethyl]-5-(4-benzamido-2-oxopyrimidin-1-yl)-4-benzoyloxyoxolan-3-yl]methyl benzoate