Method for the preparation of tizanidine hydrochloride
    6.
    发明授权
    Method for the preparation of tizanidine hydrochloride 有权
    盐酸替扎西汀制备方法

    公开(公告)号:US08487113B2

    公开(公告)日:2013-07-16

    申请号:US13131269

    申请日:2009-12-18

    IPC分类号: C07D285/06

    CPC分类号: C07D417/12

    摘要: The invention deals with a preparation method of salts of 5-chloro-4-(2-imidazolin-2-yl-amino)-2,1,3-benzothiadiazole (tizanidine) of formula I, especially tizanidine hydrochloride, comprising preparation of a salt of tizanidine of formula I and a carboxylic acid as an intermediate, from which, after acidification with hydrogen chloride, tizanidine hydrochloride is obtained in a high yield and purity.

    摘要翻译: 本发明涉及式I的5-氯-4-(2-咪唑啉-2-基 - 氨基)-2,1,3-苯并噻二唑(替扎尼定​​)的盐的制备方法,特别是盐酸替扎尼定,包括制备 式I的替扎尼定的盐和作为中间体的羧酸,在用氯化氢酸化后,以高产率和纯度获得盐酸替扎尼定。

    METHOD FOR THE PREPARATION OF TIZANIDINE HYDROCHLORIDE
    7.
    发明申请
    METHOD FOR THE PREPARATION OF TIZANIDINE HYDROCHLORIDE 有权
    制备喹唑啉盐酸盐的方法

    公开(公告)号:US20110263863A1

    公开(公告)日:2011-10-27

    申请号:US13131269

    申请日:2009-12-18

    IPC分类号: C07D285/06

    CPC分类号: C07D417/12

    摘要: The invention deals with a preparation method of salts of 5-chloro-4-(2-imidazolin-2-yl-amino)-2,1,3-benzothiadiazole (tizanidine) of formula I, especially tizanidine hydrochloride, comprising preparation of a salt of tizanidine of formula I and a carboxylic acid as an intermediate, from which, after acidification with hydrogen chloride, tizanidine hydrochloride is obtained in a high yield and purity.

    摘要翻译: 本发明涉及式I的5-氯-4-(2-咪唑啉-2-基 - 氨基)-2,1,3-苯并噻二唑(替扎尼定​​)的盐的制备方法,特别是盐酸替扎尼定,包括制备 式I的替扎尼定的盐和作为中间体的羧酸,在用氯化氢酸化后,以高产率和纯度获得盐酸替扎尼定。

    Process for the preparation of N-(1-benzo[b]thien-2-ylethyl)-N-hydroxyurea
    10.
    发明授权
    Process for the preparation of N-(1-benzo[b]thien-2-ylethyl)-N-hydroxyurea 有权
    制备N-(1-苯并[b]噻吩-2-基乙基)-N-羟基脲的方法

    公开(公告)号:US08933250B2

    公开(公告)日:2015-01-13

    申请号:US13055463

    申请日:2009-04-06

    IPC分类号: C07D333/58 C07D333/60

    CPC分类号: C07D333/58

    摘要: A method of preparation of N-(1-benzo[b]thien-2-ylethyl)-N-hydroxyurea of formula (I) with the use of a reaction of 1-(benzo[b]thien-2-yl)-ethanol of formula (II) with hydroxyurea of formula (III) in organic solvents, organic acids, their mixtures or in mixtures thereof with water, being catalyzed by strongly acidic cation exchangers or various hydrogen sulphates.

    摘要翻译: 使用1-(苯并[b]噻吩-2-基) - 哌嗪的反应制备式(I)的N-(1-苯并[b]噻吩-2-基乙基)-N-羟基脲的方法 式(II)的乙醇与有机溶剂中的有机酸,有机酸,它们的混合物或与水的混合物由式(III)的羟基脲催化,由强酸性阳离子交换剂或各种硫酸氢盐催化。