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    • 5. 发明申请
    • A METHOD FOR THE PREPARATION OF AN ENANTIOMER OF A TETRACYCLIC BENZAZEPINE
    • 一种制备四羧酸苯并噻唑类化合物的方法
    • WO2008125578A2
    • 2008-10-23
    • PCT/EP2008/054316
    • 2008-04-10
    • N.V. ORGANONKEMPERMAN, Gerardus Johannes
    • KEMPERMAN, Gerardus Johannes
    • C07D471/14
    • C07D471/14
    • The present invention relates to a method for the preparation of mirtazapine and tetracyclic analogous compounds having substantial enantiomeric excess of the R or S form. The invention further relates to a novel intermediate and its use for the preparation of mirtazapine having a substantial enantiomeric excess of the R or S form. The method comprising the steps of a: providing a carboxylic acid compound according to Formula (I) having a substantial enantiomeric excess of the R or S form, b: converting the carboxylic acid group of compound I into a ketone group, producing a ketone compound of Formula (II), c: optionally reducing ketone compound II with a mild reduction agent to form the intermediate hydroxy compound of Formula (III) and d: forming the mirtazapine of Formula (IV) by reduction of the ketone compound II or of the hydroxy compound III using a strong reduction agent.
    • 本发明涉及制备具有R或S形式的显着对映体过量的米氮平和四环类似物的方法。 本发明还涉及一种新的中间体及其用于制备具有R或S形式的基本对映体过量的米氮平的用途。 该方法包括以下步骤:a)提供具有R或S形式的基本对映异构体过量的式(I)的羧酸化合物,b:将化合物I的羧酸基团转化为酮基,产生酮化合物 式(II)的化合物,c:任选地用温和的还原剂还原酮化合物II以形成式(III)的中间体羟基化合物,和d:通过还原酮化合物II或式 羟基化合物III使用强还原剂。