title: Combined Photoredox and Lewis Acid Catalyzed α-Hydroxyalkylation of Cyclic Ethers with Aromatic Ketones.
abstract: The photochemically induced coupling of aromatic ketones with cyclic ethers such as tetrahydrofuran, tetrahydropyran, and 1,4-dioxane was studied. Direct photolysis of the substrates with UV-A light centered at 350 nm does not lead to photoinduced hydrogen transfer whereas the addition of a mixture of the Lewis acid catalysts Ti(O(i)Pr)4 and BF3 enables the formation of the hydroxyalkylation products.
authors.affiliation: Department of Chemistry, University of Cologne , Greinstr. 4, Cologne D-50939, Germany.
authors.forename: Melissa
authors.initials: M
authors.lastname: Reckenthäler
authors.affiliation: Department of Chemistry, University of Cologne , Greinstr. 4, Cologne D-50939, Germany.
authors.forename: Jörg-M
authors.initials: JM
authors.lastname: Neudörfl
authors.affiliation: Department of Chemistry, University of Cologne , Greinstr. 4, Cologne D-50939, Germany.
authors.forename: Elif
authors.initials: E
authors.lastname: Zorlu
authors.affiliation: Department of Chemistry, University of Cologne , Greinstr. 4, Cologne D-50939, Germany.
authors.forename: Axel G
authors.initials: AG
authors.lastname: Griesbeck