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,用于制备基本上不含其3H-I异构体的化合物1-(2,6-二
氟苯基)-1H-1,2,3-三
唑-4-羧酸。本发明还涉及使用该中间体制备Rufinamide以及获得新的Rufinamide多晶形式,称为R-5型。本发明还涉及该新型Rufinamide多晶形式,以及含有它的组合物和其作为药物的用途。新型Rufinamide多晶形式表现出良好的稳定性和适当的物理
化学特性,适合在工业规模上进行操作。多晶形式R-5适用于作为药物治疗癫痫等惊厥症。