Synthesis of pyrrole-2-carbonitriles
    10.
    发明授权
    Synthesis of pyrrole-2-carbonitriles 失效
    吡咯-2-碳腈的合成

    公开(公告)号:US07399870B2

    公开(公告)日:2008-07-15

    申请号:US11086061

    申请日:2005-03-22

    IPC分类号: C07D207/30

    CPC分类号: C07D207/34

    摘要: The instant invention concerns processes for the production of pyrrole-2-carbonitriles such as 1-methylpyrrole-2-carbonitrile. Such processes preferably comprise the steps of reacting a pyrrole with chlorosulfonyl isocyanate in the presence of a solvent and contacting the resulting product with a molar excess of an amide such as N,N-dimethylformamide. The product of this contacting step is then contacted with a molar excess of an organic base to produce a precipitate and a solution phase. The precipitate is then separated from the solution phase and the corresponding pyrrole-2-carbonitrile is isolated from the resulting solution phase.

    摘要翻译: 本发明涉及吡咯-2-碳腈如1-甲基吡咯-2-腈的制备方法。 这样的方法优选包括在溶剂存在下使吡咯与氯磺酰基异氰酸酯反应并使所得产物与摩尔过量的酰胺如N,N-二甲基甲酰胺接触的步骤。 然后将该接触步骤的产物与摩尔过量的有机碱接触以产生沉淀物和溶液相。 然后将沉淀物与溶液相分离,并从所得溶液相中分离相应的吡咯-2-腈。