Process for the purification of gabapentin
    4.
    发明授权
    Process for the purification of gabapentin 有权
    加巴喷丁的纯化方法

    公开(公告)号:US07989658B2

    公开(公告)日:2011-08-02

    申请号:US11722056

    申请日:2005-12-15

    IPC分类号: C07C227/40 C07C229/28

    摘要: The present invention relates to a process for the purification of gabapentin. The process relates to the addition of hydrochloric acid to an aqueous solution or suspension of gabapentin, before, during or after the concentration step of that solution, and the subsequent slurry of the gabapentin by the addition of an alcoholic solvent. The so obtained gabapentin has an high purity degree and, in particular, is characterized by a low content of lactam.

    摘要翻译: 本发明涉及一种纯化加巴喷丁的方法。 该方法涉及在该溶液的浓缩步骤之前,之中或之后向加巴喷丁的水溶液或悬浮液中加入盐酸,以及通过加入醇溶剂加入加巴喷丁的后续浆液。 如此获得的加巴喷丁具有高纯度,特别是其内酰胺含量低。

    PROCESS FOR PREPARING NEBIVOLOL
    7.
    发明申请
    PROCESS FOR PREPARING NEBIVOLOL 有权
    制备NEBIVOLOL的方法

    公开(公告)号:US20100076206A1

    公开(公告)日:2010-03-25

    申请号:US12515581

    申请日:2007-11-23

    IPC分类号: C07D311/74

    摘要: The present invention relates to a process for preparing Nebivolol and, more particularly, to an improved process for synthesizing enantiomerically enriched 6-fluoro chroman alcohol or epoxide derivatives of formula, wherein R and X is defined in the description; as useful intermediates in the preparation of Nebivolol.

    摘要翻译: 本发明涉及制备奈比洛尔的方法,更具体地说,涉及用于合成对映体富集的6-氟苯并二氢吡喃醇或式的环氧化物衍生物的改进方法,其中R和X在说明书中定义; 作为制备奈比洛尔的有用中间体。

    PROCESS FOR THE PREPARATION OF GABAPENTIN
    8.
    发明申请
    PROCESS FOR THE PREPARATION OF GABAPENTIN 审中-公开
    制备GABAPENTIN的方法

    公开(公告)号:US20090326266A1

    公开(公告)日:2009-12-31

    申请号:US12400080

    申请日:2009-03-09

    IPC分类号: C07C229/28

    摘要: A process for the preparation of 1,1-cyclohexanediacetic acid monoamide comprising the amination of 1,1-cyclohexanediacetic acid anhydride by reaction with aqueous NH3 at a temperature lower than 30° C. by using a NH3/anhydride molar ratio lower than 3, and the product precipitation through the acidification of the reaction mixture; a precipitation process of 1,1-cyclohexanediacetic acid monoamide; and a process for the synthesis of gabapentin comprising the above preparation of 1,1-cyclohexanediacetic acid monoamide, the Hofmann transposition of the same monoamide, the purification of a gabapentin salt and the crystallization from organic solvent.

    摘要翻译: 一种制备1,1-环己烷二乙酸单酰胺的方法,该方法包括使用低于3的NH 3 /酐摩尔比,通过与NH 3水溶液在低于30℃的温度下反应来胺化1,1-环己烷二乙酸酐, 并通过反应混合物酸化产物沉淀; 1,1-环己烷二乙酸单酰胺的沉淀过程; 以及合成加巴喷丁的方法,其包括上述1,1-环己烷二乙酸单酰胺的制备,相同单酰胺的霍夫曼转位,加巴喷丁盐的纯化和有机溶剂的结晶。

    Process for the purification of gabapentin
    10.
    发明授权
    Process for the purification of gabapentin 有权
    加巴喷丁的纯化方法

    公开(公告)号:US07365226B2

    公开(公告)日:2008-04-29

    申请号:US10582790

    申请日:2004-12-14

    IPC分类号: C07C61/08

    CPC分类号: C07C227/40 C07C229/28

    摘要: A process for the preparation of gabapentin comprising the passage of a salt of the same through a ionic exchange resin of strong cationic type, the elution of the gabapentin which has fixed onto the column and the crystallization from organic solvent, characterized in that the resin is regenerated by using a mineral acid in a molar quantity between 50 and 90%, is described.

    摘要翻译: 一种用于制备加巴喷丁的方法,其包括使其通过强阳离子型离子交换树脂,其中固定在柱上的加巴喷丁的洗脱和从有机溶剂中结晶的洗脱,其特征在于树脂是 通过使用摩尔量为50-90%的无机酸再生。