A convenient, in situ method is described for reductive removal of an aromatic amino-group in high yield: hydroquinone is used to reduce intermediate diazonium salts and the method has been applied to certain azulenylamines.
R. N. McDonald and J. M. Richmond, J. Chem. Soc., Chem. Commun., 1973, 605 DOI: 10.1039/C39730000605
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