Disproportionation, isomerization and de-tert-butylation of 2,6-di-tert-butylphenol catalyzed by H-MCM-41

Aerobic oxidation of 2,4,6-tri-tert-butylphenol to quinones catalyzed by copper(II) complexes of an N-octylated bis-benzimidazolyl ligand

“…This retardation of the rate of reaction suggests the formation of tert-butanol in the oxidation reaction rather than isobutylene (Scheme II/III). Further isobutylene is not expected to be a final product in the present case as it has reported to be found as a byproduct when the reaction is carried out at temperatures of 100 0 C or above [25].…”

Guaiacol demethoxylation catalyzed by Re2O7 in ethanol

“…These alkylphenols can be converted to value-added products. For example, alkylphenols are used intensively in the polymer industry as antioxidants, UV absorbers and thermal stabilizers [34]. 2-Ethylphenol and 3-ethylphenol are the starting materials for photochemicals while 4ethylphenol is employed to obtain 4-vinylphenol, an intermediate in the synthesis of pharmaceuticals, dyes, and various antioxidants used in the manufacture of rubbers and polymers [35].…”