Irradiation of a 2-benzyl-2-hydroxybenzo[b]furan-3(2H)-one in acetone–water results in the equivalent of a benzilic acid rearrangement of the aryl benzyl α-diketone formed from homolysis of the heterocycle, to give the 3-benzyl-3-hydroxybenzo[b]furan-2(3H)-one analogue.
J. H. van der Westhuizen, D. Ferreira and D. G. Roux, J. Chem. Soc., Perkin Trans. 1, 1977, 1517 DOI: 10.1039/P19770001517
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