Visible light-induced highly selective transformation of olefin to ketone by 2,4,6-triphenylpyrylium cation encapsulated within zeolite Y
作者:Yasuhiro Shiraishi、Naoya Saito、Takayuki Hirai
DOI:10.1039/b515137f
日期:——
2,4,6-Triphenylpyrylium cation encapsulated withinzeolite Y promotes highly selective transformation of olefins to ketones with molecular oxygen, under visible light (lambda > 400 nm) irradiation at room temperature.
Photochemical electron-transfer reactions of 1,1-diarylethylenes
作者:Susan L. Mattes、Samir. Farid
DOI:10.1021/ja00283a034
日期:1986.11
constant for nucleophilic addition of methanol to 1a/sup .+/ is 1.6 x 10/sup 9/ M/sup -1/s/sup -1/; for addition to 1b/sup .+/ it is approx.10/sup 7/ M/sup -1/s/sup -1/. Methanol does not add efficiently to 1c/sup .+ / . Photooxygenation of the diarylethylene yields mainly the corresponding 3,3,6,6-tetraaryl-1,2-dioxane in a chain process. In the presence of methanol and oxygen, 1a yields mainly 1-hyd
Photoredox Catalytic Activation of Sulfur Hexafluoride for Pentafluorosulfanylation of α-Methyl- and α-Phenyl Styrene
作者:David Rombach、Hans-Achim Wagenknecht
DOI:10.1002/cctc.201800501
日期:2018.7.19
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