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Depending on the oxidation strength of the one-electron oxidants either persistent α-carbonyl radicals or α-carbonyl cation derived benzofurans are formed from enolates A1–A6, a result which can readily be rationalized by the measured oxidation potentials of enolates A1–A6and α-carbonyl radicals R1–R6.
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Röck et al. (1993) studied this question.
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