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    • 9. 发明授权
    • AN IMPROVED SYNTHESIS AND PURIFICATION OF (R*,R*)-2- (DIMETHYLAMINO) METHYL]-1-( 3-METHOXYPHENYL) CYCLOHEXANOL HYDROCHLORIDE
    • EIN VERBESSERTES SYNTHESE- UND REINIGUNGSVERFAHRENFÜR(R *,R *)-2 - [(二甲基氨基)甲基] -1-(3-甲氧基苯基)环己基氢氯酸盐
    • EP1077923B1
    • 2004-01-02
    • EP99930115.3
    • 1999-05-20
    • Mallinckrodt Inc.
    • JARVI, Esa, T.GRAYSON, Neile, A.HALVACHS, Robert, E.
    • C07C213/02C07C213/10C07C217/74C07B49/00
    • C07C213/10C07B49/00C07C213/02C07C2601/14C07C217/74
    • (R*,R*)-2-[ (dimethylamino) methyl]-1-( 3-methoxyphenyl) cyclohexanol (Tramadol) is synthesized in a Grignard reaction in the presence of an additive resulting in a higher trans:cis ratio of product than is obtained in the absence of the additive. The Grignard reaction between 3 bromoanisole and the appropriate Mannich base in the presence of an amine or ether additive gives the amine product in an improved trans/cis ratio. The base is converted to its hydrochloride and recrystallized from a low molecular weight nitrile such as acetonitrile until a greater than 98 % trans/cis ratio is obtained. Recrystallization from isopropanol gives (R*,R*)-2-[(dimethylamino)methyl]-1-(3-methoxyphenyl)cyclohexanol hydrochloride free of the nitrile solvent. A hydrochloride of Tramadol can be synthesized without increasing a ratio of trans:cis by including a step in which HCl is added to Tramadol base in the presence of toluene.
    • (R *,R *)-2 - [(二甲基氨基)甲基] -1-(3-甲氧基苯基)环己醇(曲马多)在Grignard反应中,在添加剂存在下合成,得到较高的反式:顺式比例的产物 在不存在添加剂的情况下获得。 在胺或醚添加剂存在下,3-溴苯甲醚与合适的曼尼希碱之间的格利雅反应,得到改进的反/顺式比例的胺产物。 将碱转化为其盐酸盐并从低分子量腈如乙腈中重结晶,直到获得大于98%的反/顺比。 从异丙醇中重结晶得到不含腈溶剂的(R *,R *)2 - [(二甲基氨基)甲基] -1-(3-异丁苯基)环己醇盐酸盐。 可以通过包括在甲苯存在下将HCl加入到曲马多碱中的步骤而不增加反式:顺式的比例来合成曲马朵的盐酸盐。