72805-46-0Relevant academic research and scientific papers
Photoredox Catalytic Activation of Sulfur Hexafluoride for Pentafluorosulfanylation of α-Methyl- and α-Phenyl Styrene
Rombach, David,Wagenknecht, Hans-Achim
, p. 2955 - 2961 (2018/05/30)
Sulfur hexafluoride is inert, non-toxic, and cannot simply be applied as pentafluorosulfanylation reagent. We present the first photoredox catalytic way to convert it into pentafluorosulfanylated α-methyl and α-phenyl styrenes simply by using light. The work tackles the challenges of precise activation of sulfur hexafluoride by a photoredox catalyst with designed consecutive electron transfer cycles in a fashion that styrenes trap the generated pentafluorosulfanyl radical. The method overcomes the highly problematic access to vinylic and allylic pentafluorosulfanyl styrenes and combines it with the disposal of the most potent greenhouse gas. Together with the use of light as energy source, an exceptionally high level of sustainability is gained.
Visible light-induced highly selective transformation of olefin to ketone by 2,4,6-triphenylpyrylium cation encapsulated within zeolite Y
Shiraishi, Yasuhiro,Saito, Naoya,Hirai, Takayuki
, p. 773 - 775 (2008/02/03)
2,4,6-Triphenylpyrylium cation encapsulated within zeolite Y promotes highly selective transformation of olefins to ketones with molecular oxygen, under visible light (λ > 400 nm) irradiation at room temperature. The Royal Society of Chemistry 2006.
Reactions on Aromatic Olefins Induced by Aminium Salts: Protic-Acid or Radical Cation Catalyzed Processes
Ciminale, Francesco,Lopez, Luigi,Mele, Giuseppe
, p. 12685 - 12696 (2007/10/02)
Aromatic olefins by reaction with aminium salts lead, in strongly acidic reaction media, to different reaction products, arising from the intermediate formation of carbocation or radical-cation species.
Pyrylium Salts as Photosensitizers in Homogeneous and Heterogeneous Electron-Transfer Catalysis. - A Comparison with Cyano Arenes
Mattay, Jochen,Vondenhof, Martin,Denig, Richard
, p. 951 - 958 (2007/10/02)
Two new triphenylpyrylium salts, both being fixed to a polymeric backbone, have been synthesized.They are sensitizers for photochemically induced electron-transfer reactions, offering the possibility of heterogeneous charge transfer.Their usability in electron-transfer-catalyzed dimerizations and mixed cycloadditions of 1,3-cyclohexadiene and phenyl vinyl ether has been tested in comparison to other common photosensitizers such as 9,10-dicyanoanthracene and 1,4-dicyanonaphthalene.In addition, 2,4,6-triphenylpyrylium tetrafluoroborate was shown to operate as an efficient sensitizer for the dimerization and the photooxygenation of 1,1-diphenylethene.Diverse selectivities in the product formation indicate different mechanisms and are discussed in view of earlier results reported in the literature. - Key Words: Electron-transfer photocatalysis / Electron transfer, photoinduced / Photooxygenation / Pyrylium salts, polymeric / Radical cation cycloadditions
