Acidolysis of 3,4-dimethyl-4-nitrocyclohexa-2,5-dienyl acetate in >55% sulphuric acid proceeds by the AAl1 mechanism, generating the ipso-Wheland inter-mediate which is also formed in the nitration of oxylene; at these but not at lower acidities the results of the acidolysis are relevant to the outcome of nitration.
H. W. Gibbs, R. B. Moodie and K. Schofield, J. Chem. Soc., Chem. Commun., 1976, 492 DOI: 10.1039/C39760000492
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