The coupling of 1-arylquinaldinium salts with diazonium salts has given a number of formazans of symmetrical structure with a 1-arylquinoline residue attached to the formazyl carbon atom. Unsymmetrical formazans have been synthesized by coupling the phenylhydrazone of 2-formyl-1-phenylquinolinium perchlorate with diazonium salts. The oxidation of the formazans has given tetrazolium salts.
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Pilyugin, G.T., Shinkorenko, S.V. & Stashkevich, V.V. Studies in the field of synthetic dyes. Chemistry of Heterocyclic Compounds 4, 231–233 (1970). https://doi.org/10.1007/BF00601135
- Organic Chemistry
- Carbon Atom