Abstract
Three methylthio and/or methylsulfinyl substituted benzils (2, 6 and 7) have been synthesized on photo-or thermochemical routes, respectively. Photodecarboxylation of some new different substituted mesityl benzoates (1 a-e) leads to hindered biphenyls (3 a-e) accompanied sometimes by aldehyde (4a-c) and benzil formation (2) due to compatitive a-cleavage and subsequent stabilization processes of such generated free aroyl radicals. A short summary on constitutional conditions for intramolecular photoredox reactions of ortho functionalized aryl sulfinyl compounds is presented.
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