Irradiation of 2,3-epoxy-3-phenylpropiophenones causes rearrangement to dibenzoylmethanes, trans→cis-isomerisation, and photofragmentation via acylcarbene intermediates. Photophysical studies show that the lowest excited state is a (π*,n) state.
D. J. Dewar and R. G. Sutherland, J. Chem. Soc., Perkin Trans. 2, 1977, 1522 DOI: 10.1039/P29770001522
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