Preparation of substituted butenolides via palladium-free etherification and amination of masked mucohalic acids
    3.
    发明申请
    Preparation of substituted butenolides via palladium-free etherification and amination of masked mucohalic acids 审中-公开
    通过无钯醚化和胺化掩蔽的粘酸盐制备取代丁烯酸酯

    公开(公告)号:US20050059831A1

    公开(公告)日:2005-03-17

    申请号:US10942557

    申请日:2004-09-16

    CPC分类号: C07D307/66 C07D307/60

    摘要: Methods and materials for preparing 4-substituted-2-buten-4-olides are disclosed. The methods include reacting a masked mucohalic acid with a primary or secondary amine or with an arylol in the presence of a base. Unlike existing processes, the disclosed methods do not require the use of palladium, which make them well suited for preparing intermediates in drug syntheses.

    摘要翻译: 公开了制备4-取代-2-丁烯-4-醇的方法和材料。 所述方法包括在碱的存在下使掩蔽的粘膜卤酸与伯胺或仲胺或与芳族酯反应。 与现有方法不同,所公开的方法不需要使用钯,这使得它们非常适合于在药物合成中制备中间体。

    Preparation of aryl-substituted butenolides using mucohalic acids
    4.
    发明申请
    Preparation of aryl-substituted butenolides using mucohalic acids 审中-公开
    使用粘盐酸制备芳基取代丁烯酸酯

    公开(公告)号:US20050131239A1

    公开(公告)日:2005-06-16

    申请号:US10987531

    申请日:2004-11-12

    CPC分类号: C07D307/58 C07D307/60

    摘要: Methods and materials for preparing 3-aryl-2-buten-4-olides and 2,3-bisaryl-2-buten-4-olides are disclosed. The methods include reacting a mucohalic acid with a reducing agent to give a 2,3-dihalo-2-buten-4-olide, which undergoes at least one Pd catalyzed cross-coupling reaction with an arylboronic acid.

    摘要翻译: 公开了3-芳基-2-丁烯-4-醇和2,3-二芳基-2-丁烯-4-醇的制备方法和材料。 所述方法包括使粘羟基酸与还原剂反应得到2,3-二卤代-2-丁烯-4-醇,其与芳基硼酸进行至少一种Pd催化的交叉偶联反应。