Synthesis of 3‐arylazo‐6‐oxopyridazin‐5‐carbonitriles: A versatile precursor for condensed arylazopyridazin‐6‐ones
作者:Saleh M. Al‐Mousawi、Morsy A. El‐Apasery、Najat Al‐Kandery、Mohamed H. Elnagdi
DOI:10.1002/jhet.5570450210
日期:2008.3
1-[2-Phenyl-1-diazenyl]-1-[2-phenylhydrazono]acetone or 1-[-2-(4-methylphenyl)-1-diazenyl]-1-[-2-(4-methylphenyl)hydrazono]-butan-2-one were produced via coupling the (E) 2-oxopropanal-1-phenyl-hydrazone or (E) 2-oxobutanal-1-(4-methylphenyl)hydrazone with aromatic diazonium salts. These formazanes condensed readily with ethyl cyanoacetate to yield 5-methyl-3-oxo-2-phenyl-6-phenylazo-2,3-dihydropy
1- [2-苯基-1-二氮烯基] -1- [2-苯基hydr]丙酮或1-[-2-(4-甲基苯基)-1-二氮烯基] -1-[-2-(4-甲基苯基)hydr通过将(E)2-氧杂丙醛-1-苯基-或(E) 2-氧杂双醛-1-(4-甲基苯基)hydr与芳族重氮盐偶合来生产]-丁-2-酮。这些甲maz易于与氰基乙酸乙酯缩合,生成5-甲基-3-氧代-2-苯基-6-苯基偶氮-2,3-二氢哒嗪-4-腈化合物(9a),5-乙基-3-氧代-2-p -甲苯基-6-对甲苯基-2,3-二氢哒嗪-4-腈和/或5-乙基-3-氧代-2,6-二-p-tolyl-2,3-dihydropyridazine-4-carbitrile在哌啶的存在下与硫反应生成氨基噻吩并哒嗪酮。后者与贫电子烯烃和乙炔反应生成氨基酞嗪。化合物(9a)也与亚苄基丙二腈反应,得到芳基偶氮酞嗪酮。