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- OR 3-Pyridinyl)-2-cyclohexen-1-ones (I)及其
肟衍
生物可用于制备(3-
氨基苯基)
吡啶,后者又可用于制备已知的抗菌剂。同时,通过
甲基乙烯酮与1-(
吡啶基)-1-(低三级胺基)-
乙烯(II)或较低烷基3-(
吡啶基)-
3-氧代丙酸酯反应制备I。此外,通过将I转化为其
肟,酰化
肟并在酸性条件下加热以产生N-(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。