(2R,5R)-2-(3-((benzyloxy)methyl)-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-5-((S)-cyano(hydroxy)methyl)-4-methoxytetrahydrofuran-3-yl acetate 、
4-METHYLPHENYL2,3,4,6-TETRA-O-ACETYL-1-THIO-Α-D-MANNOPYRANOSIDE4-甲基苯基2,3,4,6-四-O-乙酰基-1-硫代-Α-D-吡喃甘露糖苷 在
N-碘代丁二酰亚胺 、 silver tetrafluoroborate 作用下,
以
二氯甲烷 为溶剂,
反应 16.0h,
以90%的产率得到[(2R,3R,4S,5S,6S)-3,4,5-triacetyloxy-6-[(S)-[(2R,3R,4R,5R)-4-acetyloxy-5-[2,4-dioxo-3-(phenylmethoxymethyl)pyrimidin-1-yl]-3-methoxyoxolan-2-yl]-cyanomethoxy]oxan-2-yl]methyl acetate