Process for preparing nebivolol
    22.
    发明授权
    Process for preparing nebivolol 有权
    奈比洛尔的制备方法

    公开(公告)号:US08084629B2

    公开(公告)日:2011-12-27

    申请号:US12935150

    申请日:2009-03-16

    IPC分类号: C07D407/04 C07D311/14

    CPC分类号: C07D311/58 C07D407/04

    摘要: The present invention relates to a process for reducing a compound of formula (I) wherein X is halogen, a hydroxy group, an alkylsulfoniloxy group or an arylsulfonyloxy group; to give a compound of formula (II) as a diastereoisomerically pure compound of RS/SR configuration characterized in that said reduction is carried out by the use of (+)-B-chlorodiisopinocampheylborane or (−)-B-chlorodiisopinocampheylborane. The compounds of formula (II) are useful as intermediates for the preparation of Nebivolol.

    摘要翻译: 本发明涉及还原其中X为卤素,羟基,烷基磺酰氧基或芳基磺酰氧基的式(I)化合物的方法; 得到式(II)化合物,为非对映异构体纯的RS / SR构型化合物,其特征在于所述还原是通过使用(+) - B-氯二氧杂环己烷基硼烷或( - ) - B-氯二氧杂环己烷基硼烷来进行的。 式(II)化合物可用作制备奈比洛尔的中间体。

    Process for the preparation of levetiracetam
    25.
    发明授权
    Process for the preparation of levetiracetam 失效
    左乙拉西坦的制备方法

    公开(公告)号:US07939676B2

    公开(公告)日:2011-05-10

    申请号:US12561616

    申请日:2009-09-17

    IPC分类号: C07D207/06 C07D207/08

    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。