Substituted 1-(6-methoxy-2-benzothiazolyl)-2-pyridones 5a-5f have been prepared from N-(6-methoxy-2-benzothiazolyl)cyanoacetamide (2) which on reactions with 4-substituted benzaldehydes gives 3-aryl-2-cyano-N-(6-methoxy-2-benzothiazolyl)-2-propenamides 4a-4g. Derivatives 4a-4f were cyclized with malonodinitrile in the presence of piperidine to give the corresponding 2-pyridones 5a-5f. The IR, UV, 1H NMR and mass spectra of the substances synthesized are discussed.
从N-(6-甲氧基-2-苯并噻唑基)氰乙酰胺(2)制备了取代的1-(6-甲氧基-2-苯并噻唑基)-2-吡啶酮5a-5f,该化合物与4-取代苯甲醛反应形成3-芳基-2-氰基-N-(6-甲氧基-2-苯并噻唑基)-2-丙烯酰胺4a-4g。衍生物4a-4f在哌啶存在下与马隆二腈环化,得到相应的2-吡啶酮5a-5f。讨论了所合成物的红外、紫外、1H NMR和质谱光谱。