A Facile Synthesis of 4,5-Dialkoxy-o-benzoquinones by the Oxidation of Catechol with Iodates in Alcohol

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Abstract
4,5-Dimethoxy-o-benzoquinone has been prepared by the oxidation of catechol with sodium iodate in methanol. In higher alcohols, the same oxidation occurs in the presence of a crown ether to give the corresponding 4,5-dialkoxy-o-benzoquinones. In the latter cases using 18-crown-6, the potassium salt is more effective than the sodium salt.