Method of preparing a benzofuran or benzothiophene compound
    2.
    发明授权
    Method of preparing a benzofuran or benzothiophene compound 失效
    制备苯并呋喃或苯并噻吩化合物的方法

    公开(公告)号:US06555697B1

    公开(公告)日:2003-04-29

    申请号:US10110443

    申请日:2002-04-11

    申请人: Thierry Schlama

    发明人: Thierry Schlama

    IPC分类号: C07D30779

    摘要: The invention concerns a novel method for preparing a benzofuran or benzothiophene compound by cyclizing an aromatic compound bearing a side-chain comprising at least two carbon atoms, one of the carbon atoms being bound to the benzene cycle by an oxygen or sulphur atom, the other carbon atom is in carboxylic form and a formyl radical in ortho position relative to said chain. The inventive method is characterised in that it consists in cyclizing the latter in the presence of an efficient amount of a carbonate base in a medium comprising a carboxylic acid anhydride and optionally an organic solvent.

    摘要翻译: 本发明涉及一种制备苯并呋喃或苯并噻吩化合物的新方法,其中环芳族化合物含有至少两个碳原子,一个碳原子通过氧或硫原子与苯环结合, 碳原子是羧酸形式,在相对于所述链的邻位是甲酰基。 本发明的方法的特征在于其在有效量的碳酸酯碱存在下在包含羧酸酐和任选的有机溶剂的介质中使其后者环化。