The reaction of sodium methoxide with the by-product obtained by the action of an excess of 85% hydrogen peroxide in trifluoroacetic acid on 3-amino-4-phenylfuroxan suggests, for this derivative, the 3-nitro-4-phenylfuroxan structure. X-Ray analysis confirms this deduction.
R. Calvino, A. Gasco, A. Serafino and D. Viterbo, J. Chem. Soc., Perkin Trans. 2, 1981, 1240 DOI: 10.1039/P29810001240
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