Process For the Preparation of Highly Pure (E) N,N-Diethyl-2-Cyano-3-(3,4-Dihydroxy-5-Nitro Phenyl) Acrylamide (Entacapone)
    4.
    发明申请
    Process For the Preparation of Highly Pure (E) N,N-Diethyl-2-Cyano-3-(3,4-Dihydroxy-5-Nitro Phenyl) Acrylamide (Entacapone) 审中-公开
    制备高纯度(E)N,N-二乙基-2-氰基-3-(3,4-二羟基-5-硝基苯基)丙烯酰胺(恩他卡朋)的方法

    公开(公告)号:US20080319226A1

    公开(公告)日:2008-12-25

    申请号:US12092657

    申请日:2005-11-09

    IPC分类号: C07C231/00

    摘要: A process for the preparation of highly pure (E)-N,N-diethyl-2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)acrylamide (Entacapone). It comprises condensing 3,4-dihydroxy-5-nitro benzaldehyde with N,N-diethyl cyano acetamide in an organic solvent in the presence of an organic base and an acid under reflux conditions followed by distilling off the solvent under vacuum and treating the residue with a lower aliphatic carboxylic acid at 40-8O0 C. The resulting residue is extracted with a chlorinated solvent and the solvent is distilled off under vacuum. The resulting residue is extracted with an organic solvent to obtain crude N,N-diethyl-2-cyano-3-3,4-dihydroxy-5-nitrophenyl)acrylamide. The crude product N,N-diethyl-2-cyano-3-(3,4-dihydroxy-5-nitrophenyl) acrylamide formed is treated with a mixture of organic alcohol and organic acid in the molar ratio of the crude product to organic alcohol 1:5 to 15 and crude product to organic acid 1:1 to 3 under reflux conditions.

    摘要翻译: 制备高纯度(E)-N,N-二乙基-2-氰基-3-(3,4-二羟基-5-硝基苯基)丙烯酰胺(恩他卡朋)的方法。 它包括在有机碱和酸的存在下,在回流条件下,将3,4-二羟基-5-硝基苯甲醛与N,N-二乙基氰基乙酰胺在有机溶剂中缩合,然后在真空下蒸除溶剂,并处理残余物 与40-80℃的低级脂族羧酸反应。所得残余物用氯化溶剂萃取,真空蒸除溶剂。 所得残余物用有机溶剂萃取,得到粗N,N-二乙基-2-氰基-3-3,4-二羟基-5-硝基苯基)丙烯酰胺。 所形成的粗产物N,N-二乙基-2-氰基-3-(3,4-二羟基-5-硝基苯基)丙烯酰胺以有机醇与有机酸的混合物以粗产物与有机醇的摩尔比 1:5至15,并在回流条件下将粗产物与有机酸1:1至3反应。

    Novel Process for Preparation of Bicalutamide
    10.
    发明申请
    Novel Process for Preparation of Bicalutamide 审中-公开
    制备比卡鲁胺的新方法

    公开(公告)号:US20080177109A1

    公开(公告)日:2008-07-24

    申请号:US11574886

    申请日:2005-05-10

    IPC分类号: C07C315/02

    摘要: The present invention discloses a process for the synthesis of N-[4-Cyano-3-(trifluoromethyl)phenyl]-3-[(4-fluorophenyl)sulphonyl]-2-hydroxy-2-methyl propanamide (Form I). The invention discloses a reagent for oxidation of N-[4-Cyano-3-(trifluoromethyl)phenyl]-3-[(4-fluorophenyl)thio]-2-hydroxy-2-methyl propanamide to N-[4-Cyano-3-(trifluoromethyl)phenyl]-3-[(4-fluorophenyl)sulphonyl]-2-hydroxy-2-methyl propanamide. More particularly, the invention discloses a method of purification of N-[4-Cyano-3-(trifluoromethyl)phenyl]-3-[(4-fluorophenyl)sulphonyl]-2-hydroxy-2-methyl propanamide in a mixture of methylethyl ketone and hexane giving form (I). This form (I) is useful as an active pharmaceutical and has antiandrogenic activity.

    摘要翻译: 本发明公开了N- [4-氰基-3-(三氟甲基)苯基] -3 - [(4-氟苯基)磺酰基] -2-羟基-2-甲基丙酰胺(形式I)的合成方法。 本发明公开了一种用于将N- [4-氰基-3-(三氟甲基)苯基] -3 - [(4-氟苯基)硫] -2-羟基-2-甲基丙酰胺氧化成N- [4-氰基 - 3-(三氟甲基)苯基] -3 - [(4-氟苯基)磺酰基] -2-羟基-2-甲基丙酰胺。 更具体地说,本发明公开了一种将N- [4-氰基-3-(三氟甲基)苯基] -3 - [(4-氟苯基)磺酰基] -2-羟基-2-甲基丙酰胺在甲基乙基 酮和己烷,得到形式(I)。 该形式(I)可用作活性药物并具有抗雄激素活性。