Process for preparing chiral compounds from recemic epoxides by using chiral salen catalysts
    3.
    发明授权
    Process for preparing chiral compounds from recemic epoxides by using chiral salen catalysts 有权
    通过使用手性盐酸催化剂从接受环氧化物制备手性化合物的方法

    公开(公告)号:US06720434B2

    公开(公告)日:2004-04-13

    申请号:US10181193

    申请日:2002-07-11

    IPC分类号: C07D30104

    摘要: The present invention relates to chiral salen catalysts and a process for preparing chiral compounds from racemic epoxides by using them. More particularly, the present invention is to provide chiral salen catalysts and its use for producing chiral compounds such as chiral epoxides and chiral 1,2-diols economically in high yield and high optical purity by performing stereoselective hydrolysis of racemic epoxides, wherein the chiral salen catalyst comprises a cationic cobalt as a center metal of chiral salen ligand and counterions having weak nucleophilic property to resolve disadvantages associated with conventional chiral salen catalysts, and can be used continuously without any activating process of used catalysts because it does not loose a catalytic activity during the reaction process.

    摘要翻译: 本发明涉及手性盐酸催化剂和通过使用它们由外消旋环氧化物制备手性化合物的方法。 更具体地说,本发明是通过进行外消旋环氧化物的立体选择性水解,提供手性盐酸催化剂及其用于以高产率和高光学纯度经济地制备手性环氧化物和手性1,2-二醇的用途,其中手性盐 催化剂包含阳离子钴作为手性salen配体的中心金属和具有弱亲核性质的抗衡离子,以解决与常规手性salen催化剂相关的缺点,并且可以连续使用而不使用所用催化剂的任何活化方法,因为它不会在 反应过程。

    Process for preparing (-)-(18-crown-6)-2,3,11,12-tetracarboxylic acid, and (-)-chiral stationary phases for resolution of racemic compounds using the same
    5.
    发明授权
    Process for preparing (-)-(18-crown-6)-2,3,11,12-tetracarboxylic acid, and (-)-chiral stationary phases for resolution of racemic compounds using the same 有权
    ( - ) - (18-冠-6)-2,3,11,12-四羧酸和( - ) - 手性固定相制备用于拆分外消旋化合物的方法

    公开(公告)号:US06818778B2

    公开(公告)日:2004-11-16

    申请号:US10432326

    申请日:2003-05-22

    IPC分类号: C07D32300

    CPC分类号: C07D323/00

    摘要: The present invention relates to a process for preparing (−)-(18-crown-6)-2,3,11,12-tetracarboxylic acid and its use for (−)-chiral stationary phases for resolution of racemic compounds. More particularly, the present invention relates to the process for preparing (−)-(18-crown-6)-2,3,11,12-tetracarboxylic acid expressed by formula (1) and the use thereof as a stationary phases for resolution of racemic compounds, wherein the use of them provides excellent separation of a desired chiral compound from racemic mixture in employing capillary electrophoresis (CE) or liquid chromatography to elute the desired one first by controlling a flowing order of enantioners, thus allowing to be consistently separated in an economical due to much less requirement of eluent, quantitative and high purity manner.

    摘要翻译: 本发明涉及制备( - ) - (18-冠-6)-2,3,11,12-四羧酸的方法及其用于( - ) - 手性固定相以拆分外消旋化合物的方法。 更具体地说,本发明涉及由式(1)表示的( - ) - (18-冠-6)-2,3,11,12-四羧酸的制备方法及其作为用于分辨的固定相的用途 的外消旋化合物,其中使用它们在使用毛细管电泳(CE)或液相色谱法中从外消旋混合物中提供优异的分离,以首先通过控制对映体的流动顺序洗脱所需的手性化合物,从而允许一致地分离 由于洗脱液要求少,定量和高纯度的方式经济。