Yu, Jin-Quan Corey, E. J. A Mild, Catalytic, and Highly Selective Method for the Oxidation of α,β-Enones to 1,4-Enediones A new and simple method is described for the one-step oxidation of α,β-enones to 1,4-enediones in good yields (generally 80−90%) using <i>t</i>-butylhydroperoxide as stoichiometric oxidant and 20% Pd(OH)<sub>2</sub> on carbon (5 mol %) as catalyst in CH<sub>2</sub>Cl<sub>2</sub> solution. The same reagents have been used to convert ethylene ketals of α,β-enones to the corresponding monoethylene ketals of 1,4-enediones. Seven representative examples are presented in Table . All of the available evidence on these oxidations points to a radical-chain mechanism initiated by the <i>tert</i>-butylperoxy radical (see Scheme ). γ-<i>tert</i>-Butylperoxy ethers are formed as major products in the oxidation of α,β-enones possessing only a single γ-hydrogen. Butylperoxy ethers;oxidations points;stoichiometric oxidant;monoethylene ketals;enedione;enone;ethylene ketals;Selective Method;representative examples;tert;CH 2 Cl 2 solution 2003-02-21
    https://acs.figshare.com/articles/journal_contribution/A_Mild_Catalytic_and_Highly_Selective_Method_for_the_Oxidation_of_-Enones_to_1_4-Enediones/3649539
10.1021/ja0340735.s001