Selective fluorination by halogen exchange of chlorodiazines and chloropyridines promoted by the ‘proton sponge’-triethylamine tris(hydrogen fluoride) system was written by Darabantu, M.;Lequeux, T.;Pommelet, J.-C.;Ple, N.;Turck, A.. And the article was included in Tetrahedron in 2001.Name: 3,6-Difluoropyridazine This article mentions the following:
The ‘proton sponge’-triethylamine tris(hydrogen fluoride) mixtures provide a mild and efficient fluorinating reagent to introduce selectively fluorine atoms by halogen exchange into chlorodiazines and chloronitropyridine series. The PS/Et3N.3HF mixtures provide an efficient reagent to realize a selective fluorination of various π-deficient chlorinated heterocycles: (benzo)diazines and pyridines. In the experiment, the researchers used many compounds, for example, 3,6-Difluoropyridazine (cas: 33097-39-1Name: 3,6-Difluoropyridazine).
3,6-Difluoropyridazine (cas: 33097-39-1) belongs to pyridazine derivatives. Pyridazine-based compounds continued to be a great source of biologically active compounds as evidenced by the number of publications which emerged in 2021. Pyridazine and derivatives coordinate readily with transition metals to form complexes and catalysts with synthetic utility.Name: 3,6-Difluoropyridazine
Referemce:
Pyridazine – Wikipedia,
Pyridazine | C4H4N2 – PubChem