Autoxidation of 4-Hydrazinylquinolin-2(1<i>H</i>)-one; Synthesis of Pyridazino[4,3-<i>c</i>:5,6-<i>c</i>′]diquinoline-6,7(5<i>H</i>,8<i>H</i>)-diones

Abstract

An efficient synthesis of a series of pyridazino[4,3-c:5,6-c′]diquinolines was achieved via the autoxidation of 4-hydrazinylquinolin-2(1H)-ones. IR, NMR (1H and 13C), mass spectral data, and elemental analysis were used to fit and elucidate the structures of the newly synthesized compounds. X-ray structure analysis and theoretical calculations unequivocally proved the formation of the structure. The possible mechanism for the reaction is also discussed.

Keywords

• 4-hydrazinylquinolin-2(1<i>H</i>)-one
• pyridazino[4,3-<i>c</i>:5,6-<i>c</i>′]diquinoline-6,7(5<i>H</i>,8<i>H</i>)-dione
• autoxidation reaction
• X-ray
• DFT