The present invention refers to an improved method for the preparation of compound 1-(2,6-difluorobenzyl)-1H-1,2,3-triazole-4-carboxylic acid substantially free of its 3H-I isomer. The invention also refers to the use of said intermediate for the preparation of Rufinamide and for obtaining a new polymorphic form of Rufinamide, designed as Form R-5. The invention also refers to said new polymorph of Rufinamide, and to the composition containing it and its use as medicament. The new polymorph of Rufinamide shows good stability and appropriate physico-chemical properties for its manipulation on industrial scale. Polymorph Form R-5 will be suitable to use as pharmaceutical for the treatment of convulsions, especially for the treatment of epilepsy.
本发明涉及一种改进的方法,用于制备1-(2,6-二
氟苯基)-1H-1,2,3-三
唑-4-羧酸化合物,该化合物基本上不含其3H-I异构体。本发明还涉及使用该中间体制备鲁芬酰胺,并获得一种新的鲁芬酰胺多晶形式,称为R-5型。本发明还涉及该新型鲁芬酰胺多晶形式,以及含有它的组合物和其作为药物的用途。新型鲁芬酰胺多晶形式表现出良好的稳定性和适当的物理
化学性质,可在工业规模上进行操纵。R-5型多晶形式将适用于作为治疗惊厥的药物,特别是用于治疗癫痫。