Process for preparing tiotropium bromide
    6.
    发明授权
    Process for preparing tiotropium bromide 有权
    制备噻托溴铵的方法

    公开(公告)号:US09090607B2

    公开(公告)日:2015-07-28

    申请号:US14377271

    申请日:2013-02-08

    CPC classification number: C07D451/14 C07D451/10

    Abstract: The present invention relates to a novel process for the preparation of tiotropium bromide there is provided a process for preparing tiotropium bromide comprising (i) reacting scopine oxalate with diethylamine in an inert solvent to form scopine; (ii) reacting scopine and methyl di-(2-dithienyl)glycolate (MDTG) in the presence of an inorganic base, and in an inert solvent to form N-demethyltiotropium; (iii) reacting N-demethyltiotropium with bromomethane in an inert solvent to form tiotropium bromide; (iv) crystallizing tiotropium bromide in a mixture of methanol and acetone, and optionally thereafter, (v) micronizing the tiotropium bromide so formed.

    Abstract translation: 本发明涉及一种制备噻托溴铵的新方法,其提供了一种制备噻托溴铵的方法,其包括(i)在惰性溶剂中使草酸草丁酯与二乙胺反应以形成胡萝卜素; (ii)在无机碱的存在下和在惰性溶剂中反应西酞菁和二(2-二噻吩基)乙醇酸甲酯(MDTG)以形成N-脱甲基噻托铵; (iii)使N-去甲基二氢卟酚与溴甲烷在惰性溶剂中反应形成噻托溴铵; (iv)在甲醇和丙酮的混合物中结晶噻托溴铵,随后任选地(v)使如此形成的噻托溴铵微粉化。

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