Electron Transfer Photofragmentations of 3-Phenylpropiophenones

Article abstract of DOI:10.1007/BF00809453

Photolysis of 3-phenylpropiophenones 1 a-d in the presence of 2,4,6-triphenylpyrylium tetrafluoroborate (TPT) yields the corresponding α,β-unsaturated ketones 2 a-c and 1 d (from 1c), together with acetophenone (3), benzophenone (4), benzoic acid (5) and benzaldehyde (6), presumably by fragmentations of the radical cation 1^+*, generated via a single electron transfer process from 1 to the excited TPT.