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C(3)‐Hydroxylation of chromone (1a), flavone (1b) and α‐naphthoflavone (4) via acid‐catalysed hydrolysis of the corresponding β‐methoxy‐α‐hydroxydimethylacetals (2a, 2b, and 5) formed by iodobenzene diacetate‐potassium hydroxide methanol oxidation is described.
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Moriarty et al. (1985) studied this question.
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