PREPARATION METHOD OF 4-AMINOMETHYLBENZOIC ACID
    1.
    发明申请
    PREPARATION METHOD OF 4-AMINOMETHYLBENZOIC ACID 有权
    4-氨基乙酰苯甲酸的制备方法

    公开(公告)号:US20120296114A1

    公开(公告)日:2012-11-22

    申请号:US13522465

    申请日:2010-12-09

    Applicant: Woo Sun Kim

    Inventor: Woo Sun Kim

    Abstract: The present invention relates to a preparation method of 4-aminomethylbenzoic acid comprising the following steps: preparing 4-carboxylbenzaldehyde or an alkyl ester thereof (methyl 4-formyl benzoate); reacting the 4-carboxylbenzaldehyde or an alkyl ester thereof (methyl 4-formyl benzoate) with hydroxyamine to oximate the same; and contact reducing 4-carboxylbenzaldehyde oxime or an alkyl ester oxime thereof obtained by the oximation, through hydrogen in a sodium hydroxide aqueous solution. Since methyl 4-hydroxyiminomethylbenzoate is reacted as a raw material in the presence of an alkali, hydrogen of a relatively low pressure can be used and a purification process is also simple, thereby enabling preparation of 4-aminomethylbenzoic acid with a low cost and high yield.

    Abstract translation: 本发明涉及4-氨基甲基苯甲酸的制备方法,包括以下步骤:制备4-羧基苯甲醛或其烷基酯(4-甲酰基苯甲酸甲酯); 使4-羧基苯甲醛或其烷基酯(4-甲酰基苯甲酸酯)与羟胺反应,使其氧化; 并通过氢氧化钠水溶液中的氢气将通过肟化得到的4-羧基苯甲醛肟或其烷基酯肟接触。 由于在碱存在下使4-羟基亚氨基甲基苯甲酸甲酯作为原料反应,所以可以使用相对低压的氢,并且纯化方法也很简单,从而能够以低成本和高产率制备4-氨基甲基苯甲酸 。

    Preparation method of 4-aminomethylbenzoic acid
    3.
    发明授权
    Preparation method of 4-aminomethylbenzoic acid 有权
    4-氨基甲基苯甲酸的制备方法

    公开(公告)号:US08907127B2

    公开(公告)日:2014-12-09

    申请号:US13522465

    申请日:2010-12-09

    Applicant: Woo Sun Kim

    Inventor: Woo Sun Kim

    Abstract: The present invention relates to a preparation method of 4-aminomethylbenzoic acid comprising the following steps: preparing 4-carboxylbenzaldehyde or an alkyl ester thereof (methyl 4-formyl benzoate); reacting the 4-carboxylbenzaldehyde or an alkyl ester thereof (methyl 4-formyl benzoate) with hydroxyamine to oximate the same; and contact reducing 4-carboxylbenzaldehyde oxime or an alkyl ester oxime thereof obtained by the oximation, through hydrogen in a sodium hydroxide aqueous solution. Since methyl 4-hydroxyiminomethylbenzoate is reacted as a raw material in the presence of an alkali, hydrogen of a relatively low pressure can be used and a purification process is also simple, thereby enabling preparation of 4-aminomethylbenzoic acid with a low cost and high yield.

    Abstract translation: 本发明涉及4-氨基甲基苯甲酸的制备方法,包括以下步骤:制备4-羧基苯甲醛或其烷基酯(4-甲酰基苯甲酸甲酯); 使4-羧基苯甲醛或其烷基酯(4-甲酰基苯甲酸酯)与羟胺反应,使其氧化; 并通过氢氧化钠水溶液中的氢气将通过肟化得到的4-羧基苯甲醛肟或其烷基酯肟接触。 由于在碱存在下使4-羟基亚氨基甲基苯甲酸甲酯作为原料反应,所以可以使用相对低压的氢,并且纯化方法也很简单,从而能够以低成本和高产率制备4-氨基甲基苯甲酸 。

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