Abstract
Tetrazolium-5-dinitromethylide sodium salt has been prepared (91%) by cyclization of 1-amino-1-hydrazino-2,2-dinitroethene with nitrous acid in water. 5-Imino-1-(hydroxyiminonitromethyl) derivatives were obtained by nitration of 2-(5-amino-1,3-dimethyl-1H-1,2,4-triazol-4-ium-4-yl)- and 2-(5-amino-4-methyl-1H-tetrazolium-1-yl)acetate complex salts. Treatment of 4-methyl-1-(2-oxopropyl)-1-tetrazolium methylsulfate with nitric and sulfuric acid gave methyl (3-nitro-1,2,4-oxadiazol-5-yl)amine (27%) probably via dinitromethylide followed by cyclization and loss of nitrogen.
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Published in Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 127–134, January, 2005.
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Katritzky, A.R., Sommen, G.L., Gromova, A.V. et al. Synthetic routes towards tetrazolium and triazolium dinitromethylides. Chem Heterocycl Compd 41, 111–118 (2005). https://doi.org/10.1007/s10593-005-0116-5
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DOI: https://doi.org/10.1007/s10593-005-0116-5