Abstract
Direct phenol–catechol conversion has been realized as a result of the solid-phase reaction of 2,4-di-tert-butylphenol with cuprous oxide under high pressure and shear deformation on the Bridgman anvils. The yield of 3,5-di-tert-butylcatechol in this reaction was about 85%. When cupric oxide was used in the solid-phase process, oxidative coupling of the starting phenol took place, resulting in quantitative formation of tetra-tert-butyl-ortho-bisphenol. The reaction of 6-substituted derivatives of 2,4-di-tert-butylphenol with cuprous oxide was used as an example to demonstrate the possibility of substitutive ortho-hydroxylation yielding 7–20% of pyrocatechols.
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Vol’eva, V.B., Zhorin, V.A., Ovsyannikova, M.N. et al. Solid-Phase ortho-Hydroxylation of 2,4-Di-tert-butylphenol and Its Derivatives. Russ J Org Chem 56, 350–352 (2020). https://doi.org/10.1134/S107042802001030X
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DOI: https://doi.org/10.1134/S107042802001030X