Process for preparing 1-(6-methylpyridin-3-yl)-2-[4-methylsulphonyl)-phenyl]ethanone
    1.
    发明授权
    Process for preparing 1-(6-methylpyridin-3-yl)-2-[4-methylsulphonyl)-phenyl]ethanone 失效
    1-(6-甲基吡啶-3-基)-2- [4-甲基磺酰基] - 苯基]乙酮的制备方法

    公开(公告)号:US06566527B1

    公开(公告)日:2003-05-20

    申请号:US10030096

    申请日:2002-03-14

    IPC分类号: C07D21360

    CPC分类号: C07D213/50

    摘要: A five-step process for preparing 1-(6-methylpyridin-3-yl)-2-[4-methylsulfonyl)phenyl]ethanone of formula (I): The process involves the following steps: (a) 4-(methylthio)benzyl alcohol is converted into 4-(methylthio)benzyl chloride; (b) 4-(methylthio)benzyl chloride is converted with an alkali metal cyanide into 4-(methylthio)phenylacetonitrile; (c) 4-(methylthio)phenylacetonitrile is condensed with a 6-methyinicotinic ester to give 3-[2-(2-(methylthio)phenyl)-2-cyanoacetyl](6-methyl)pyridine; (d) 3-[2-(4-(methylthio)phenyl-2-cyanoacetyl](6-methyl)pyridine is hydrolyzed and decarboxylated under acidic conditions to give 3-[2-(4-(methylthio)-phenyl)acetyl](6-methyl)pyridine is hydrolyzed and decarboxylated under acidic conditions to give 3-[2-(4-(methylthio)phenyl)acetyl(6-methyl)pyridine; and (e) 3-[2(4-(methylthio)phenyl)acetyl](6-methyl)pyridine is oxidized to give the end product. The compound of formula (I) is an intermediate for preparing COX-2 inhibitors, pharmaceutically active compounds having analgesic and antiinflammatory action.

    摘要翻译: 制备式(I)的1-(6-甲基吡啶-3-基)-2- [4-甲基磺酰基]苯基]乙酮的五步方法:该方法包括以下步骤:(a)4-(甲硫基) 苄醇转化成4-(甲硫基)苄基氯; (b)4-(甲硫基)苄基氯用碱金属氰化物转化成4-(甲硫基)苯乙腈; (c)4-(甲硫基)苯基乙腈与6-甲基烟酰酯缩合,得到3- [2-(2-(甲硫基)苯基)-2-氰基乙酰基](6-甲基)吡啶; (d)3- [2-(4-(甲硫基)苯基-2-氰基乙酰基](6-甲基)吡啶在酸性条件下水解脱羧,得到3- [2-(4-(甲硫基) - 苯基)乙酰基 ](6-甲基)吡啶在酸性条件下水解和脱羧,得到3- [2-(4-(甲硫基)苯基)乙酰基(6-甲基)吡啶;和(e)3- [2-(4- )苯基)乙酰基](6-甲基)吡啶被氧化得到最终产物。式(I)化合物是制备COX-2抑制剂,具有止痛和抗炎作用的药物活性化合物的中间体。

    Process for preparing 1-(6-methylpyridin-3-yl)-2-[4-(methylsulfony)phenyl]ethanone
    2.
    发明授权
    Process for preparing 1-(6-methylpyridin-3-yl)-2-[4-(methylsulfony)phenyl]ethanone 失效
    1-(6-甲基吡啶-3-基)-2- [4-(甲基磺酰基)苯基]乙酮的制备方法

    公开(公告)号:US06600046B2

    公开(公告)日:2003-07-29

    申请号:US10283167

    申请日:2002-10-30

    IPC分类号: C07D21346

    CPC分类号: C07D213/50

    摘要: The process for preparing 1-(6-methylpyridin-3-yl)-2-[(4-methlsulfonyl)-phenyl]ethanone of the formula I: In a first step, 4-(methylthio)phenylacetonitrile is condensed with a 6-methylnicotinic ester to give 3-[2-(4-(methlthio)phenyl)-2-cyanoacetyl](6-methyl)pyridine of the formula II: In a second step, the compound of formula II is hydrolyzed and decarboxylated under acidic conditions using a mixture of acetic acid and a mineral acid, to give 3-[2-(4-(methylthio)phenyl)acetyl](6-methyl)pyridine of the formula III: Finally, in a last step, the compound of formula III is oxidized to give the end product.

    摘要翻译: 制备式I的1-(6-甲基吡啶-3-基)-2 - [(4-甲基吡啶基) - 苯基]乙酮的方法:在第一步中,将4-(甲硫基)苯基乙腈与6- 甲基烟酸酯,得到式II的3- [2-(4-(甲基硫基)苯基)-2-氰基乙酰基](6-甲基)吡啶:在第二步中,将式II化合物在酸性条件下水解和脱羧 使用乙酸和无机酸的混合物,得到式III的3- [2-(4-(甲硫基)苯基)乙酰基](6-甲基)吡啶:最后,在最后一步中, III被氧化得到最终产物。