Anodic oxidation of 4-methoxybenzo[b]thiophens is temperature dependent, proceeding at elevated temperature via a four-electron process to give benzo[b]thiophen-4,7-quinone bisacetals in excellent yield.
B. L. Chenard and J. S. Swenton, J. Chem. Soc., Chem. Commun., 1979, 1172 DOI: 10.1039/C39790001172
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