New tri-tert-alkyl substituted o-quinones of tetraline family

New tri-tert-alkyl substituted o-quinones of 3-tert-alkyl-5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalene-1,2-dione chemotype were obtained from phenol and 2,5-dichloro-2,5-dimethylhexane, with the SeO₂ oxidation of the sterically hindered phenol moiety having been performed at the final step. The electrochemical reduction of these quinones proceeds in two stages: the first reduction wave (E_1/2 = –0.60 ÷ –0.62 V) is reversible, while the second stage is irreversible.