Summary
Photolysis of 3-phenylpropiophenones1 a–d in the presence of 2,4,6-triphenylpyrylium tetrafluoroborate (TPT) yields the corresponding α,β-unsaturated ketones2 a–c and1 d (from1 c), together with acetophenone (3), benzophenone (4), benzoic acid (5) and benzaldehyde (6), presumably by fragmentations of the radical cation1 + ·, generated via a single electron transfer process from1 to the excitedTPT.
Zusammenfassung
Photolyse der 3-Phenylpropiophenone1 a–d in Gegenwart von 2,4,6-Triphenyl-pyrylium-tetrafluoroborat (TPT) ergeben die entsprechenden α,β-ungesättigten Ketone2 a–c und1 d (aus1 c), neben Acetophenon (3), Benzophenon (4), Benzoesäure (5) und Benzaldehyd (6), vermutlich durch Fragmentierung des Radikal-Kations1 + ·, das mittels Übertragung eines Elektrons von1 zuTPT im angeregten Zustand erzeugt wird.
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Baldoví, M.V., García, H., Miranda, M.A. et al. Electron transfer photofragmentations of 3-phenylpropiophenones. Monatsh Chem 121, 371–375 (1990). https://doi.org/10.1007/BF00809453
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DOI: https://doi.org/10.1007/BF00809453