申请人:Sterling Drug Inc.
公开号:US04127583A1
公开(公告)日:1978-11-28
3-(4- OR 3-Pyridinyl)-2-cyclohexen-1-ones (I) and their oxime derivatives are useful in preparing (3-aminophenyl)pyridines, in turn, useful in preparing known antibacterial agents. Also shown is the preparation of I by starting with the reaction of methyl vinyl ketone with either 1-(pyridinyl)-1-(lower-tertiary-amino)-ethylene (II) or lower-alkyl 3-(pyridinyl)-3-oxopropanoate. Also shown is the process of converting I to its oxime, acylating the oxime and heating the acylated oxime under acidic conditions to produce N-(lower-acyl)-3-(pyridinyl)-aniline (VII), and hydrolyzing VII under aqueous alkaline conditions to produce the corresponding 3-(pyridinyl)aniline.
3-(4-或3-吡啶基)-2-环己烯-1-酮(I)及其肟衍生物在制备(3-氨基苯基)吡啶方面有用,而后者又可用于制备已知的抗菌剂。还显示了通过将甲基乙烯酮与1-(吡啶基)-1-(低三级氨基)-乙烯(II)或较低烷基3-(吡啶基)-3-氧代丙酸酯反应开始制备I的过程。还显示了将I转化为其肟衍生物,酰化肟衍生物并在酸性条件下加热酰化肟衍生物以产生N-(较低酰基)-3-(吡啶基)-苯胺(VII),并在水性碱性条件下水解VII以产生相应的3-(吡啶基)苯胺的过程。