Synthesis of N,N-Dioxopyridazines was written by Rozen, Shlomo;Shaffer, Avshalom. And the article was included in Organic Letters in 2017.Reference of 141-30-0 This article mentions the following:
1,2-Pyridazine dioxides were prepared chemoselectively by treatment of pyridazines with HOF·MeCN (generated in situ from N2-diluted fluorine, water, and acetonitrile) at 0°. Oxidation of 3,6-dihalopyridazines and 3-chloropyridazine with HOF·MeCN yielded only pyridazine mono-N-oxides under similar conditions. The structure of pyridazine-N,N’-dioxide was determined by X-ray crystallog. The fluorine used to prepare HOF·MeCN should be handled with appropriate precautions. In the experiment, the researchers used many compounds, for example, 3,6-Dichloropyridazine (cas: 141-30-0Reference of 141-30-0).
3,6-Dichloropyridazine (cas: 141-30-0) belongs to pyridazine derivatives. Pyridazine and phthalazine have quite different spectroscopic properties compared with their isomers, pyrazine and quinoxaline. The unsubstituted pyridazines are more resistant to eletrophilic substitution due to the nature of withdrawal of electron density from the ring by two heteroatoms, while the related electron deficiency of the ring makes pyridazine more easily attacked by nucleophiles.Reference of 141-30-0
Referemce:
Pyridazine – Wikipedia,
Pyridazine | C4H4N2 – PubChem