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    Synthesis of 2-hydroxyarylaldehydes
    2.
    发明授权
    Synthesis of 2-hydroxyarylaldehydes 有权
    2-羟基芳基醛的合成

    公开(公告)号：US06274068B1

    公开(公告)日：2001-08-14

    申请号：US09209518

    申请日：1998-12-10

    申请人： Jeffrey Howard Dimmit ,  Mark Alan Kearns ,  William H. Chambless

    发明人： Jeffrey Howard Dimmit ,  Mark Alan Kearns ,  William H. Chambless

    IPC分类号： C07F302

    CPC分类号： C07C45/68

    摘要： A method for the preparation of 2-hydroxyarylaldehydes from an aryloxy magnesium compound and formaldehyde, which comprises reacting at a temperature from 40-120° C., an aryloxy magnesium compound having an aryloxy anion and a non-aryloxy anion and in which (a) the non-aryloxy anion is more basic than the aryloxy anion such that when the aryloxy magnesium compound is brought into contact with an acidic species, the acid reacts more preferentially with the non-aryloxy anion to form an aryloxy magnesium salt and (b) the aryloxy anion has at least one free position ortho to the hydroxyl group in the aryloxy anion, with formaldehyde or a compound capable of giving rise to formaldehyde under the reaction conditions in the presence of a polar co-solvent capable of providing the non-aryloxy anion in the aryloxy magnesium compound characterized in that the non-aryloxy anion is selected from the group consisting of an oxide, a hydroxide, a carboxylate, a sulphate and a nitrate.

    摘要翻译： 一种由芳氧基镁化合物和甲醛制备2-羟基芳基醛的方法，其包括在40-120℃的温度下使具有芳氧基阴离子的芳氧基镁化合物与非芳氧基阴离子反应，其中（a ）非芳氧基阴离子比芳氧基阴离子更碱性，使得当芳氧基镁化合物与酸性物质接触时，酸与非芳氧基阴离子更优选反应形成芳氧基镁盐，（b） 芳氧基阴离子在芳氧基阴离子中具有至少一个邻位羟基的游离位，甲醛或能够在反应条件下在能够提供非芳氧基的极性助溶剂的存在下产生甲醛的化合物 芳氧基镁化合物中的阴离子，其特征在于非芳氧基阴离子选自氧化物，氢氧化物，羧酸盐，硫酸盐和硝酸盐。

    Synthesis of 2-hydroxyarylaldehydes
    4.
    发明授权
    Synthesis of 2-hydroxyarylaldehydes 失效
    2-羟基芳基醛的合成

    公开(公告)号：US5856583A

    公开(公告)日：1999-01-05

    申请号：US861135

    申请日：1997-05-21

    申请人： Jeffrey Howard Dimmit ,  Mark Alan Kearns ,  William H. Chambless

    发明人： Jeffrey Howard Dimmit ,  Mark Alan Kearns ,  William H. Chambless

    IPC分类号： C07C45/68 ,  C07C45/00

    CPC分类号： C07C45/68

    摘要： A method for the preparation of 2-hydroxyarylaldehydes from an aryloxy magnesium compound and formaldehyde, which comprises reacting at a temperature from 40.degree.-120.degree. C., an aryloxy magnesium compound having an aryloxy anion and a non-aryloxy anion and in which (a) the non-aryloxy anion is more basic than the aryloxy anion such that when the aryloxy magnesium compound is brought into contact with an acidic species, the acid reacts more preferentially with the non-aryloxy anion to form an aryloxy magnesium salt and (b) the aryloxy anion has at least one free position ortho to the hydroxyl group in the aryloxy anion, with formaldehyde or a compound capable of giving rise to formaldehyde under the reaction conditions in the presence of a polar co-solvent capable of providing the non-aryloxy anion in the aryloxy magnesium compound characterized in that the non-aryloxy anion is selected from the group consisting of an oxide, a hydroxide, a carboxylate, a sulphate and a nitrate.

    摘要翻译： 一种从芳氧基镁化合物和甲醛制备2-羟基芳基醛的方法，其包括在40-120℃的温度下反应具有芳氧基阴离子的芳氧基镁化合物和非芳氧基阴离子，其中（ a）非芳氧基阴离子比芳氧基阴离子更碱性，使得当芳氧基镁化合物与酸性物质接触时，酸与非芳氧基阴离子更优先反应形成芳氧基镁盐，（b ）芳氧基阴离子在芳氧基阴离子中具有至少一个邻位羟基的游离位，甲醛或能够在反应条件下产生甲醛的化合物在极性助溶剂存在下能够提供非 - 芳氧基镁化合物中的芳氧基阴离子，其特征在于非芳氧基阴离子选自氧化物，氢氧化物，羧酸盐，硫酸盐和硝酸盐。