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Synthesis 1988; 1988(11): 897-899
DOI: 10.1055/s-1988-27745
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Oxidation of Hydroquinones with Oxygen in the Presence of Bis(1,3-propanediaminato)copper(II) Chloride

Spyridon M. Paraskevas* , Demetrios Konstantinidis, Georgia Vassilara
  • *Department of Chemistry (Organic Chemistry), University of Athens, 13A Navarinou Street, GR-10680 Athens, Greece
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Publication Date:
20 August 2002 (online)

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Treatment of hydroquinones such as 1,2-dihydroxybenzene, 1,4-dihydroxybenzene and its 2-methyl derivative, 1,2,4-trihydroxy-6-methylbenzene, 1,2- and 1,4-dihydroxynaphthalene with oxygen in ethanol in the presence of bis (1,3-propanediaminato)copper(II) chloride and a few drops of acetic acid effects oxidative C-C coupling plus oxidation of the hydroquinone to the quinone system to afford the corresponding biquinones in yields exceeding 75%.

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