[EN] PROCESS FOR PREPARATION OF RUFINAMIDE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE RUFINAMIDE
申请人:LUPIN LTD
公开号:WO2013105029A1
公开(公告)日:2013-07-18
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芬酰胺(I)的新工艺,包括:在醇和水的混合物中反应2,6-二氟苯甲酰肼(II)和丙炔酸(III),以产生1-(2,6-二氟苯甲基)-1H-1,2,3-三唑-4-羧酸(IV),对酸(IV)进行酯化以得到酯(V),并用氨处理酯(V)。本发明还涉及一种从醇和水的混合物中通过结晶纯化1-(2,6-二氟苯甲基)-1H-1,2,3-三唑-4-羧酸(IV)的工艺。本发明还提供了一种通过从极性无水溶剂与水或醇的混合物中结晶纯化鲁芬酰胺(I)的工艺。