Synthesis of novel pyridazino[3,4-b]quinoxalines

Article abstract of DOI:10.1002/jhet.5570340107

The pyridazino[3,4-b]quinoxaline 12 was synthesized by the cyclization of the α-arylhydrazonoacylhydrazide 11. The reaction of compound 12 with phosphoryl chloride gave pyridazino[3,4-b]quinoxaline 13, whose reactions with sodium azide or cyclic secondary