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A convenient synthesis of 3-formyl-2-oxo-1,2-dihydroquinoxaline chlorophenylhydrazones: Novel tautomeric equilibria between hydrazone imine and diazenyl enamine forms with long-range pSSrototropy |
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| Authors: | Yoshihisa Kurasawa Kaoru Yamazaki Setsuko Tajima Yoshihisa Okamoto Atsushi Takada |
| Abstract: | 3-Formyl-2-oxo-1,2-dihydroquinoxaline chlorophenylhydrazones 4a-c were synthesized from the reactions of 3-methyl-2-oxo-1,2-dihydroquinoxaline 3 with chlorophenyl diazonium salts, and 4b,c were found to exhibit the tautomeric equilibria between the hydrazone imine and diazenyl enamine forms in the dimethylsulfoxide solutions. |
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