The yellow product isolated from the reaction of 3-methylindole with diazotised 2-methoxy-4-nitroaniline at pH 6–7 is o-formamidoacetophenone 2-methoxy-4-nitrophenylhydrazone (9), and not 3-formyl-2,3-dihydro-2-(2-methoxy-4-nitroanilino)-3-methylindazole (2) as originally proposed.
M. F. G. Stevens, J. Chem. Soc., Perkin Trans. 1, 1975, 1555 DOI: 10.1039/P19750001555
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