Process For Purifying Thioctic Acid in Water
    1.
    发明申请
    Process For Purifying Thioctic Acid in Water 有权
    在水中净化硫酸的方法

    公开(公告)号:US20080227990A1

    公开(公告)日:2008-09-18

    申请号:US11909305

    申请日:2006-03-21

    IPC分类号: C07D339/04

    CPC分类号: C07D339/04

    摘要: Process for purifying thioctic acid in water comprising the following steps: a) dissolving the thioctic acid in an aqueous alkaline solution or alternatively dissolving a thioctic acid salt, if necessary adjusting the pH to alkaline values, b) acidifying the solution from step (a) with an acid chosen from the class consisting of sulfuric acid, phosphoric acid, methanesulfonic acid to a pH between 5.4 and 5.8. c) isolating the thioctic acid precipitated in step (b) by conventional methods.

    摘要翻译: 在水中纯化硫辛酸的方法,其包括以下步骤:a)将硫辛酸溶解在碱性水溶液中,或者如果需要,将溶解硫辛酸盐,将pH调节至碱性值,b)酸化步骤(a)的溶液, 使用选自硫酸,磷酸,甲磺酸的酸至pH在5.4至5.8之间的酸。 c)通过常规方法分离步骤(b)中沉淀的硫辛酸。

    Process for purifying thioctic acid in water
    4.
    发明授权
    Process for purifying thioctic acid in water 有权
    净化西北极酸在水中的工艺

    公开(公告)号:US07547792B2

    公开(公告)日:2009-06-16

    申请号:US11909305

    申请日:2006-03-21

    IPC分类号: C07D339/02

    CPC分类号: C07D339/04

    摘要: Process for purifying thioctic acid in water comprising the following steps: a) dissolving the thioctic acid in an aqueous alkaline solution or alternatively dissolving a thioctic acid salt, if necessary adjusting the pH to alkaline values, b) acidifying the solution from step (a) with an acid chosen from the class consisting of sulfuric acid, phosphoric acid, methanesulfonic acid to a pH between 5.4 and 5.8. c) isolating the thioctic acid precipitated in step (b) by conventional methods.

    摘要翻译: 在水中纯化硫辛酸的方法,其包括以下步骤:a)将硫辛酸溶解在碱性水溶液中,或者如果需要,将溶解硫辛酸盐,将pH调节至碱性值,b)酸化步骤(a)的溶液, 使用选自硫酸,磷酸,甲磺酸的酸至pH在5.4至5.8之间的酸。 c)通过常规方法分离步骤(b)中沉淀的硫辛酸。

    Process for the preparation of metaxalone
    5.
    发明授权
    Process for the preparation of metaxalone 有权
    制备美沙酮的方法

    公开(公告)号:US06538142B1

    公开(公告)日:2003-03-25

    申请号:US10124474

    申请日:2002-04-18

    IPC分类号: C07D26304

    CPC分类号: C07D263/24

    摘要: A process for the preparation of 5-(3,5-dimethylphenoxymethyl)-2-oxazolidinone, which includes: a) reacting 3,5-dimethylphonel with epichlorohydrin to obtain a mixture of 1-(3,5-dimethylphenoxy)2,3-epoxy propane (1) and 1-(3,5-dimethylphenoxy)-3-chloro-2-propanol (2); b) reacting the mixture of (1) and (2) obtained from step (a) with benzylamine to obtain a first compound; c) reducing the first compound with hydrogen in presence of ammonia, to obtain a second compound; and d) reacting the second compound with dimethylcarbonate in the presence of a strong base to obtain 5-(3,5-dimethlphenoxymethyl)-2-oxazolidinone.

    摘要翻译: 制备5-(3,5-二甲基苯氧基甲基)-2-恶唑烷酮的方法,其包括:a)使3,5-二甲基菲酮与表氯醇反应,得到1-(3,5-二甲基苯氧基) - 环氧丙烷(1)和1-(3,5-二甲基苯氧基)-3-氯-2-丙醇(2); b)将得自步骤(a)的(1)和(2)的混合物与苄胺反应 获得第一化合物; c)在氨存在下用氢还原第一化合物,得到第二化合物; 和d)在强碱存在下使第二化合物与碳酸二甲酯反应,得到5-(3,5-二甲基苯氧基甲基)-2-恶唑烷酮。