Process for preparing roflumilast
    29.
    发明授权
    Process for preparing roflumilast 有权
    罗氟司特制备方法

    公开(公告)号:US09321726B2

    公开(公告)日:2016-04-26

    申请号:US14426881

    申请日:2013-10-16

    申请人: INTERQUIM, S.A.

    摘要: 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.

    摘要翻译: 本发明涉及一种通过活化形式的3-(环丙基甲氧基)-4-(二氟甲氧基) - 苯甲酸与选自(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 - (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) 前述(a) - (g)与(h)N-羟基琥珀酰亚胺或(i)N-羟基邻苯二甲酰亚胺,随后在无机碱存在下与3,5-二氯吡啶-4-胺反应。 本发明还涉及合成中间体。