TILIDINE ISOMERIZATION AND CRYSTALLIZATION PROCESS

    公开(公告)号:EP3331849B1

    公开(公告)日:2018-12-26

    申请号:EP16750724.3

    申请日:2016-08-03

    申请人: Siegfried AG

    IPC分类号: C07C227/36 C07C229/48

    摘要: Tilidine isomerization and crystallization process, comprising providing a reaction mixture comprising cis-tilidine, a dicarboxylic acid, water and an alcohol having 3 to 6 carbon atoms; maintaining the reaction mixture at a temperature T of from 80 °C to 150 °C at specific conditions of time and temperature; removing water from the reaction mixture and crystallizing a trans-tilidine dicarboxylic acid salt from the reaction mixture. The process allows for an efficient integration of isomerization and separation and yields trans-tilidine in a form that is essentially free of side products which are difficult to separate.

    PROCESS FOR PRODUCING 1-ARYLIMINO-2-VINYLCYCLOPROPANECARBOXYLIC ACID DERIVATIVE
    7.
    发明公开
    PROCESS FOR PRODUCING 1-ARYLIMINO-2-VINYLCYCLOPROPANECARBOXYLIC ACID DERIVATIVE 审中-公开
    VERFAHREN ZUR HERSTELLUNG EINES 1-ARYLIMINO-2-VINYLCYCLOPROPANCARBOXYLSÄURE-DERIVATS

    公开(公告)号:EP3124469A1

    公开(公告)日:2017-02-01

    申请号:EP15768994.4

    申请日:2015-03-23

    摘要: The present invention relates to a method of producing the 1-arylimino-2-vinylcyclopropanecarboxylic acid derivative represented by the formula (2) by reacting an N-(arylmethylene)glycine ester represented by the formula (1) with (E)-1,4-dibromo-2-butene using a sodium ethoxide at a yield which is close to that which is achieved when lithium tert-butoxide is used, preferably at a yield which is higher than or equal to that which is achieved when lithium tert-butoxide is used, without posing a problem with industrial-scale production.
    Further, the present invention contains a method of producing a (1R,2S)-1-arylimino-2-vinylcyclopropanecarboxylic acid derivative represented by the formula (4) by reacting an N-(arylmethylene)glycine ester represented by the formula (1) with (E)-1,4-dibromo-2-butene using a sodium ethoxide in the presence of an optically active catalyst.

    摘要翻译: 本发明涉及由式(1)表示的N-(芳基亚甲基)甘氨酸酯与(E)-1所示的式(2)所示的1-芳基亚氨基-2-乙烯基环丙烷羧酸衍生物的制造方法, 使用乙醇钠制备4-二溴-2-丁烯,其收率接近于使用叔丁醇锂时所达到的收率,优选的产率高于或等于当叔丁醇锂 被用于工业规模生产的问题。 此外,本发明包含通过使式(1)表示的N-(芳基亚甲基)甘氨酸酯与式(1)所示的(1R,2S)-1-芳基亚氨基-2-乙烯基环丙烷羧酸衍生物 与(E)-1,4-二溴-2-丁烯的反应,使用乙醇钠在光学活性催化剂存在下进行。