New process for preparing olopatadine free base and/or its hydrochloride salt
    1.
    发明公开
    New process for preparing olopatadine free base and/or its hydrochloride salt 审中-公开
    Neues Verfahren zur Herstellung von Olopatadin und / oder dessen Hydrochlorids

    公开(公告)号:EP2228371A1

    公开(公告)日:2010-09-15

    申请号:EP10155234.7

    申请日:2006-12-22

    申请人: Medichem, S.A.

    发明人: Chamorro, Iolanda

    IPC分类号: C07D313/12

    CPC分类号: C07D313/12

    摘要: The invention covers a process for preparing olopatadine free base and/or its hydrochloride salt by performing a Wittig reaction, wherein said Wittig reaction comprises the use of at least one of hexyllithium, sodium hydride and combinations thereof. The process of invention achieves olapatadine free base and/or its hydrochloride salt having less than approximately 0.5% by area percentage HPLC of olapatadine trans isomer and a reduced level of bromide impurities.

    摘要翻译: 本发明涵盖了通过进行Wittig反应来制备奥洛他定游离碱和/或其盐酸盐的方法,其中所述维t希反应包括使用己基锂,氢化钠及其组合中的至少一种。 本发明的方法实现了奥拉帕定游离碱和/或其盐酸盐,其具有低达约0.5%的奥拉他定反式异构体的HPLC百分比,并且降低了溴化物杂质含量。