Selective oxidation of phenol to produce p-benzoquinone is an important reaction with good industrial application value. The method for the synthesis of p-benzoquinone through the organoselenium-catalyzed selective oxidation of phenol with H 2 O 2 is reported. Compared with known technologies, organoselenium-catalyzed oxidation reactions avoided the use of metal catalysts and the metal residue in products. The reaction procedures were very clean and were performed under mild conditions. By using this method, the selectivity of p-benzoquinone could reach 91.6% at the maximum.
A new method for the production of p‐hydroquinone via a Pt/C‐catalyzed reduction of p‐benzoquinone is developed. Different from the conventional transfer hydrogenation reactions that usually use secondary alcohols such as isopropanol as the hydrogen source, in this work, it is unexpectedly found that cyclohexanone is a more effective hydrogen source than secondary alcohols, even cyclohexanol. This reaction affords acceptable yields of p‐hydroquinone with very high turnover number (1109) of the Pt/C catalyst. A mechanism of this interesting reaction is proposed on the basis of the results of a series of control experiments, GC–MS analysis as well as dynamic studies.
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