The present invention provides novel methods for preparing compounds (2R)-2-deoxy-2-fluoro-2-methyl-D-erythro-pentono-γ-lactone (11) and (2S)-2-deoxy-2-fluoro-2-methyl-D-erythro-pentono-γ-lactone (12), which are intermediates for preparing a key intermediate 3,5-di-O-acyl-2-fluoro-2-C-methyl-D-ribono-γ-lactone (B), for the preparation of 1-(2-deoxy-2-fluoro-2-C-methyl-β-D-ribofuranosyl)cytosine (A), which is a potent and selective anti-hepatitis C virus agent.
本发明提供了制备化合物(2R)-2-去氧-2-
氟-2-甲基-D-赤霉糖-γ-内酯(11)和(2S)-2-去氧-2-
氟-2-甲基-D-赤霉糖-γ-内酯(12)的新方法,这些是制备关键中间体3,5-二-O-酰基-2-
氟-2-C-甲基-
D-核糖-γ-内酯(B)的中间体,用于制备1-(2-去氧-2-
氟-2-C-甲基-β-
D-核糖呋喃核苷)
胞嘧啶(A)的方法,该化合物是一种有效的、选择性的抗丙型肝炎病毒药物。