Process for the preparation of Levetiracetam
    44.
    发明申请
    Process for the preparation of Levetiracetam 失效
    制备左乙拉西坦的方法

    公开(公告)号:US20110065932A1

    公开(公告)日:2011-03-17

    申请号:US12561616

    申请日:2009-09-17

    IPC分类号: C07D207/46

    CPC分类号: C07D207/27

    摘要: A process for the manufacturing of levetiracetam, wherein said process comprises the steps of: (1) reacting the (−)-(S)-alpha-ethyl-2-oxo-1-pyrrolidine acetic acid with a substoichiometric amount of an activating agent in an alcoholic solvent, and (2) subjecting the resulting reaction solution of step (1) to an ammonolysis process with gaseous ammonia.

    摘要翻译: 制备左乙拉西坦的方法,其中所述方法包括以下步骤:(1)使( - ) - (S)-α-乙基-2-氧代-1-吡咯烷乙酸与亚化学计量的活化剂 在醇溶剂中,和(2)使所得到的步骤(1)的反应溶液用氨气进行氨解过程。

    The Process for Preparing Nebivolol
    46.
    发明申请
    The Process for Preparing Nebivolol 有权
    制备奈比洛尔的方法

    公开(公告)号:US20100069652A1

    公开(公告)日:2010-03-18

    申请号:US12443279

    申请日:2007-10-02

    IPC分类号: C07D311/02

    CPC分类号: C07D407/04 C07D311/20

    摘要: The present invention relates to a process for the preparation of Nebivolol and, more particularly, to an improved method of synthesizing 6-fluoro chroman epoxides of formula (I) key intermediates in preparing nebivolol.

    摘要翻译: 本发明涉及一种制备奈比洛尔的方法,更具体地说,涉及一种合成式(I)的6-氟苯并二氢吡喃环氧化物在制备奈比洛尔中的关键中间体的改进方法。

    Process for the preparation of 4-(8-chloro-5 6-dihydro-11h-benzo-(5 6)-cyclohepta-(1 2b)-pyridin-11-ylidene-1-piperidiniecarboxylic acid ethyl ester (loratadine)
    47.
    发明授权
    Process for the preparation of 4-(8-chloro-5 6-dihydro-11h-benzo-(5 6)-cyclohepta-(1 2b)-pyridin-11-ylidene-1-piperidiniecarboxylic acid ethyl ester (loratadine) 失效
    制备4-(8-氯-5,6-二氢-11h - 苯并 - (5,6) - 环庚烷 - (1 2b) - 吡啶-11-亚基-1-哌啶甲酸乙酯(氯雷他定)的方法,

    公开(公告)号:US07449583B2

    公开(公告)日:2008-11-11

    申请号:US10493314

    申请日:2002-10-29

    IPC分类号: C07D413/04

    摘要: A process and new oxazolinic intermediates for the preparation of 4-(8-chloro-5,6-dihydro-11H-benzo-[5,6]-cyclohepta-[1,2-b]-pyridin-11-ylidene)-1-piperidinecarboxylic acid ethyl ester (loratadine) is described. The process starts from 2-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)-3-methyl-pyridine, a new intermediate to obtain loratadine. 2-(4,4-dimethyl-4, 5-dihydrooxazol-2-yl)-3-methyl-pyridine is condensed with 3-chloro-benzyl-chloride and the resultant product is treated with Grignard reagent of 4-chloro-N-methyl-piperidine. [3-(2-(3-chloro-phenyl)-ethyl]-pyridin-2-yl]-1-(methyl-piperidin-4-yl)-methanone is obtained for subsequent hydrolysis. Starting from this last compound it is possible to obtain loratadine with known methods.

    摘要翻译: 用于制备4-(8-氯-5,6-二氢-11H-苯并[5,6] - 环庚烯 - [1,2-b] - 吡啶-11-亚基) - 酮的方法和新的恶唑啉中间体 描述了1-哌啶羧酸乙酯(氯雷他定)。 该方法从2-(4,4-二甲基-4,5-二氢恶唑-2-基)-3-甲基 - 吡啶开始,得到氯雷他定的新中间体。 将2-(4,4-二甲基-4,5-二氢恶唑-2-基)-3-甲基 - 吡啶与3-氯 - 苄基氯缩合,所得产物用格氏试剂4-氯-N - 甲基 - 哌啶。 得到[3-(2-(3-氯 - 苯基) - 乙基] - 吡啶-2-基] -1-(甲基 - 哌啶-4-基) - 甲酮用于随后的水解。 可能用已知的方法获得氯雷他定。

    Process for the purification of gabapentin
    48.
    发明授权
    Process for the purification of gabapentin 失效
    加巴喷丁的纯化方法

    公开(公告)号:US07393975B2

    公开(公告)日:2008-07-01

    申请号:US10561018

    申请日:2004-06-17

    IPC分类号: C07C61/08

    摘要: A process for the preparation of gabapentin which comprises the passage of a gabapentin inorganic salt through a strong cationic ionic exchange resin, the elution of gabapentin fixed on the column, the concentration of the resultant solution and the cristallization from organic solvent, characterized in that the elution of gabapentin fixed on the column is carried out by using an ammonia and alkaline hydroxide aqueous solution, is described.

    摘要翻译: 一种制备加巴喷丁的方法,其包括通过强阳离子离子交换树脂使加巴喷丁无机盐通过,固定在柱上的加巴喷丁的洗脱,所得溶液的浓度和有机溶剂的分解,其特征在于, 使用氨和碱性氢氧化物水溶液进行固定在柱上的加巴喷丁的洗脱。