A previous synthesis of 1-hydroxy-2-methylindole has been confirmed but the n.m.r. spectrum proved to be highly sensitive to the presence of moisture in the samples and required reinterpretation. The products from the reaction of 2-nitrophenylsuccinic anhydride and fluorosulphonic acid are not hydroxyindoles but 1,4-dihydroxy-2-quinolone and 2,1-benzisoxazol-3-ylacetic acid.
R. M. Acheson, R. G. Bolton and I. Hunter, J. Chem. Soc. C, 1970, 1067 DOI: 10.1039/J39700001067
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