Method for synthesizing 2-substituted imidazoles
    13.
    发明授权
    Method for synthesizing 2-substituted imidazoles 失效
    合成2-取代咪唑的方法

    公开(公告)号:US5817823A

    公开(公告)日:1998-10-06

    申请号:US840910

    申请日:1997-04-17

    CPC分类号: C07D401/04 C07D401/12

    摘要: The present invention is a method of preparing 2-substituted imidazoles from readily available imidazoles having a leaving group in the 2-position, by alkylating the imidazole under mild conditions to afford a 3-N-alkylated imidazolium salt; and coupling the imidazolium salt with a nucleophile also under mild conditions to afford a 2-substituted 3-N-alkylated imidazolium salt. The reaction product can optionally be isolated and purified. The 2-substituted 3-N-alkylated imidazolium salt is hydrolyzed to afford a 2-substituted imidazole. Alternatively, the imidazole is coupled with a nucleophile in the presence of fluoride ion to provide a 2-substituted imidazole.

    摘要翻译: 本发明是一种通过在温和条件下使咪唑烷基化得到3-N-烷基化的咪唑鎓盐,从容易得到的具有2位离去基团的咪唑制备2-取代咪唑的方法。 并且在温和条件下将咪唑鎓盐与亲核试剂偶联,得到2-取代的3-N-烷基化的咪唑鎓盐。 反应产物可任选地被分离和纯化。 将2-取代的3-N-烷基化咪唑鎓盐水解,得到2-取代的咪唑。 或者,咪唑在存在氟离子的情况下与亲核试剂偶联以提供2-取代的咪唑。