申请人:Ishii Akihiro
公开号:US20130072699A1
公开(公告)日:2013-03-21
In the presence invention, a (2R)-2-fluoro-2-C-methyl-D-ribono-γ-lactone precursor is produced in the form of a ring-opened fluorinated compound by reaction of a 1,2-diol with sulfuryl fluoride (SO
2
F
2
) in the presence of an organic base and, optionally, a fluoride ion source. The production method of the present invention secures less number of process steps as compared to the conventional production method (shortening of three steps: cyclic sulfurous esterification, oxidation and ring-opening fluorination to one step) and satisfies the requirements for industrial production (high yield and high reproductivity). The thus-obtained (2R)-2-fluoro-2-C-methyl-D-ribono-γ-lactone precursor is useful as an important intermediate for the synthesis of 2′-deoxy-2′-fluoro-2′-C-methylcytidine with antivirus activity.
在该发明中,通过在有机碱和可选的氟化物离子源的存在下,将1,2-二醇与亚砜氟化物(SO2F2)反应,以形成一个环开启的氟化化合物,从而制备(2R)-2-氟-2-C-甲基-D-核糖-γ-内酯前体。本发明的生产方法与传统的生产方法相比,减少了工艺步骤的数量(将环状亚硫酸酯化、氧化和环开启氟化缩短为一步),并满足工业生产的要求(高产率和高再现性)。因此获得的(2R)-2-氟-2-C-甲基-D-核糖-γ-内酯前体可作为合成具有抗病毒活性的2'-脱氧-2'-氟-2'-C-甲基胞苷的重要中间体。