申请人:ICN Pharmaceuticals, Inc.
公开号:US06613896B1
公开(公告)日:2003-09-02
C-nucleosides are synthesized by a method in which a sugar is derivatized in a single step to provide a heterocycle at the C1 position, and then the heterocycle is aromatized in another single step. In one class of preferred embodiments a cyano sugar is converted into thiocarboxamide, and subsequently condensed to form an azole ring. In a second class of preferred embodiments a cyano sugar is condensed with an amino acid to provide the azole ring. In a third class of preferred embodiments a halo sugar is condensed with a preformed heterocycle to provide the azole ring.
C-核苷是通过一种方法合成的,该方法在单步反应中对糖进行衍生化,以在C1位置提供杂环,然后在另一单步反应中使杂环芳香化。在首选实施例的一类中,氰基糖被转化为硫代氨基甲酸酯,随后缩合形成唑环。在首选实施例的第二类中,氰基糖与氨基酸缩合形成唑环。在首选实施例的第三类中,卤代糖与预先形成的杂环缩合形成唑环。