The studied 1-(2-benzothiazolyl)-2-pyridones Va-Vf were prepared from N-(2-benzothiazolyl)cyanoacetamide (II) which on reaction with 4-substituted benzaldehydes afforded 3-aryl-N-(2-benzothiazolyl)-2-cyano-2-propenamides IVa-IVg. Compounds IVa-IVf were cyclized with malonodinitrile in the presence of piperidine to give the corresponding pyridones Va-Vf.
研究的1-(2-苯并噻唑基)-2-吡啶酮Va-Vf是由N-(2-苯并噻唑基)氰乙酰胺(II)与4-取代苯甲醛反应得到3-芳基-N-(2-苯并噻唑基)-2-氰基-2-丙烯酰胺IVa-IVg,化合物IVa-IVf在哌啶存在下与马隆二腈环化得到相应的吡啶酮Va-Vf。