title: Aryl imidazylates and aryl sulfates as electrophiles in metal-free ArS(N)1 reactions.
abstract: Some oxygen-bonded substituents were investigated as leaving groups in photoinduced ArS(N)1 reactions. Irradiation of aryl imidazylates and of the corresponding imidazolium salts mainly caused homolysis of the ArO-S bond. However, previously unexplored trifluoroethoxy aryl sulfates were found to undergo efficient metal-free arylation. The sulfates were conveniently generated in situ by dissolving the corresponding imidazolium salts in basic 2,2,2-trifluoroethanol.
authors.affiliation: Photogreen Lab, Department of Chemistry, University of Pavia , Via Taramelli 12, 27100 Pavia, Italy.
authors.forename: Hisham
authors.initials: H
authors.lastname: Qrareya
authors.forename: Stefano
authors.initials: S
authors.lastname: Protti
authors.forename: Maurizio
authors.initials: M
authors.lastname: Fagnoni