Process for preparing beta-ketoester compounds
    6.
    发明授权
    Process for preparing beta-ketoester compounds 有权
    制备β-酮酯化合物的方法

    公开(公告)号:US07642356B2

    公开(公告)日:2010-01-05

    申请号:US12065752

    申请日:2006-09-15

    摘要: The present invention relates to a process for preparing a beta-keto ester compound of formula (1), which is an intermediate for the synthesis of quinolone antibiotics. Particularly, the present invention is characterized by the reaction of an organo nitrile compound with a salt of mono-alkyl malonate in the presence of metal salt, and so the reaction is easy to control due to its endothermic nature, and is devoid of lachrymatory reagents with excellent reproducibility. Subsequent in situ hydrolysis in the presence of aqueous acid solution provided the compound of formula (1).

    摘要翻译: 本发明涉及一种制备式(1)的β-酮酯化合物的方法,其是用于合成喹诺酮抗生素的中间体。 特别地,本发明的特征在于在金属盐存在下有机腈化合物与单烷基丙二酸盐的反应,因此由于其吸热性质,反应易于控制,并且没有氯仿试剂 具有极好的重复性。 在酸性水溶液存在下进行原位水解,得到式(1)化合物。

    Process for preparing a 5-hydroxy-3-oxo-hexanoic acid derivative
    10.
    发明授权
    Process for preparing a 5-hydroxy-3-oxo-hexanoic acid derivative 失效
    5-羟基-3-氧代 - 己酸衍生物的制备方法

    公开(公告)号:US07081546B2

    公开(公告)日:2006-07-25

    申请号:US10540524

    申请日:2003-11-17

    IPC分类号: C07C49/173

    摘要: The present invention is related to a novel process for preparing an optically active 5-hydroxy-3-oxo-hexanoic acid derivative or its tautomer which is useful intermediate for preparing statins such as atorvastatin and rosuvastatin. Blaise reaction of (S)-4-halo-3-hydroxybutyronitrile with -haloacetate is utilized as a key reaction to provide the product with minimal formation of side products and in good yield.

    摘要翻译: 本发明涉及一种制备光学活性的5-羟基-3-氧代 - 己酸衍生物或其互变异构体的新方法,其可用于制备他汀类药物如阿托伐他汀和瑞舒伐他汀的中间体。 (S)-4-卤代-3-羟基丁腈与卤代乙酸酯的Blaise反应被用作关键反应,以使产物形成最少的副产物并以良好的产率。