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Pinacolone photolysis in the presence of phenols leads to phenyl acetates and hydroxy acetophenones; Norrish type I cleavage and subsequent hydrogen abstraction from the phenol by the tert-butyl radical gives rise to acyl–aryloxy radical pairs which recombined constituting an intermolecular photo-Fries rearrangement.
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Jiménez et al. (1995) studied this question.
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