[EN] PROCESS FOR PREPARING ROFLUMILAST<br/>[FR] PROCÉDÉ DE PRÉPARATION DE ROFLUMILAST
申请人:INTERQUIM SA
公开号:WO2014060464A1
公开(公告)日:2014-04-24
The invention relates to a process for the preparation of Roflumilast by reaction of an activated form of 3-(cyclopropylmethoxy)-4-(difluoromethoxy)-benzoic acid with an activating agent selected from (a) carbonyldiimidazole (CDI), (b) 1,1'-carbonyl-di-(1,2,4-triazol) (CDT), (c) 1,1'-carbonyl-bis-(2-methylimidazol), (d),1'-carbonyl-dipyperidin, (e) N,N'-dicyclohexylcarbodiimide (DCC), (f) N,N´-diisopropylcarbodiimide (DIC), (g) 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) and a combination of one of the previous (a)-(g) with (h) N-hydroxysuccinimide or (i) N-hydroxyphthalimide, and the subsequent reaction with 3,5-dichloropyridine-4-amine in the presence of an inorganic base. The invention also relates to the synthesis intermediates.
该发明涉及通过将活化形式的3-(环丙基甲氧基)-4-(二氟甲氧基)-苯甲酸与从(a)羰基二咪唑 (CDI)、(b)1,1'-羰基-二-(1,2,4-三唑) (CDT)、(c)1,1'-羰基-双-(2-甲基咪唑)、(d)1'-羰基-二吡啶、(e)N,N'-二环己基碳二亚胺 (DCC)、(f)N,N´-二异丙基碳二亚胺 (DIC)、(g)1-乙基-3-(3-二甲基氨基丙基)碳二亚胺 (EDC)以及前述的(a)-(g)中的一种与(h)N-羟基琥珀酰亚胺或(i)N-羟基邻苯二甲酰亚胺之一的活化剂反应制备Roflumilast的方法,以及在无机碱的存在下与3,5-二氯吡啶-4-胺发生后续反应。该发明还涉及合成中间体。