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 diazoniumsalts. These formazanes condensed readily with ethyl cyanoacetate to yield 5-methyl-3-oxo-2-phenyl-6-phenylazo-2,3-dihydropy