which on ammonium acetate-induced cyclisation afford 4-arylnicotinaldehydes in good yields. Tertiary alcohols derived from aliphatic or alicyclic ketones by the addition of methyl Grignard are converted into substituted pyridines and naphthyridines by the action of Vilsmeier's reagent in N,N-dimethylformamide followed by nucleophile-assisted cyclisation in the presence of ammonium acetate.
2-芳基
丙烷-2-醇的Vilsmeier-Haack反应通过多次亚
氨基烷基化反应进行,导致形成共轭
亚胺盐,该盐在
乙酸铵诱导的环化反应中以良好的收率得到4-芳基
烟碱醛。在N,N-二甲基甲酰胺中,通过Vilsmeier试剂的作用,由脂肪族或脂环族酮通过添加甲基格利雅(Grignard)衍生而来的叔醇转化为取代的
吡啶和
萘啶,然后在
乙酸铵存在下进行亲核试剂辅助的环化反应。