Etude de la photooxygenation par l'oxygene singulet, de la photooxygenation par l'anthracenedicarbonitrile-9,10 et de l'electrooxygenation de bicyclanylidenes en dioxetanes-1,2 dispiranniques
Etude de la photooxygenation par l'oxygene singulet, de la photooxygenation par l'anthracenedicarbonitrile-9,10 et de l'electrooxygenation de bicyclanylidenes en dioxetanes-1,2 dispiranniques
作者:Sylvie L. Tardif、Andrzej Z. Rys、Charles B. Abrams、Imad A. Abu-Yousef、Pierre B.F. Lesté-Lasserre、Erwin K.V. Schultz、David N. Harpp
DOI:10.1016/s0040-4020(97)00555-3
日期:1997.8
The chemistry of the generation and trapping of diatomicsulfur (S2) and sulfur monoxide (SO) are reviewed with special emphasis on recent work, including initial efforts to detect and trap diatomic selenium (Se2).
Experimental Investigation of the Primary and Secondary Deuterium Kinetic Isotope Effects for Epoxidation of Alkenes and Ethylene with <i>m</i>-Chloroperoxybenzoic Acid
作者:Terry Koerner、H. Slebocka-Tilk、R. S. Brown
DOI:10.1021/jo981652x
日期:1999.1.1
The secondary deuterium kinetic isotope effect (DKIE) for the epoxidation of ethylene and d(4)-ethylene by m-chloroperoxybenzoic acid (MCPBA) is determined to be 0.83, or 0.95/alpha-H. The second-order rate constants for MCPBA and MCPBA-O-D epoxidation of a variety of alkenes that differ in the steric access to the double bond (anti-sesquinorbornene (2), tetramethylethylene (3), adamantylideneadamantane
Selective sulfurization of olefins by 9,10-epidithio-9,10-dihydroanthracene: intermediacy of diatomic sulfur
作者:Wataru Ando、Hideki Sonobe、Takeshi Akasaka
DOI:10.1016/s0040-4020(01)87816-9
日期:1990.1
3-butadienes and electron-rich olefins gave 1,2-dithiins and episulfides, respectively. The reaction is explained in terms of an intermediate anthracene endodisulfide with transfer of singlet diatomicsulfur to the dienes and olefins.
Catalytic Epoxidation of Hindered Olefins with Dioxygen. Fast Oxygen Atom Transfer to Olefin Cation Radicals from Nitrogen Oxides
作者:Eric Bosch、Jay K. Kochi
DOI:10.1021/ja953786n
日期:1996.1.1
efficiently converted to epoxides by dioxygen at 25 °C in dichloromethane containing catalytic amounts of nitrogen oxides (NO2, NO+, NO, etc.). Nitrogen dioxide also effects the direct (stoichiometric) epoxidation of the same hindered olefins. Olefin cation radicals are spectrally identified as the first observable intermediate, and separate experiments confirm the facile transfer of an oxygen atom from nitrogen
Electron-transfer catalysis of olefin epoxidation with nitrogen dioxide (dinitrogen tetroxide)
作者:Eric Bosch、Jay K. Kochi
DOI:10.1039/c39930000667
日期:——
The novel epoxidation of diadamantylidene 1 and related hindered olefins with NO2 proceeds by way of the cation radical 1+˙ generated during the electron-transfer chain (ETC) catalysis initiated by nitrosonium.