申请人:LUPIN LIMITED
公开号:US20140357871A1
公开(公告)日:2014-12-04
The present invention relates to a novel process for preparation of rufinamide (I) comprising: reacting 2,6-difluorobenzyl azide (II) and propiolic acid (III) in a mixture of alcohol and water to produce 1-(2,6-difluorobenzyl)-1H-1,2,3-triazole-4-carboxylic acid (IV), esterifying the acid (IV) to ester (V) and treating ester (V) with ammonia. The invention further relates to process for purification of 1-(2,6-difluorobenzyl)-1H-1,2,3-triazole-4-carboxylic acid (IV), by crystallization from a mixture of alcohol and water. The present invention also provides process for purification of rufinamide (I) by crystallization from mixture of polar aprotic solvent with water or alcohol.
本发明涉及一种制备鲁非那酰胺(I)的新工艺,包括以下步骤:将2,6-二氟苯甲基叠氮化合物(II)和丙炔酸(III)在醇和水的混合物中反应,生成1-(2,6-二氟苯甲基)-1H-1,2,3-三唑-4-羧酸(IV),对酸(IV)进行酯化反应得到酯(V),然后用氨水处理酯(V)。本发明还涉及通过从醇和水的混合物中结晶纯化1-(2,6-二氟苯甲基)-1H-1,2,3-三唑-4-羧酸(IV)的工艺。本发明还提供了通过从极性无质子溶剂与水或醇的混合物中结晶纯化鲁非那酰胺(I)的工艺。