IRA-200 resin-supported platinum(II) complex for photooxidation of olefins
作者:Ke Feng、Li-Zhu Wu、Li-Ping Zhang、Chen-Ho Tung
DOI:10.1016/j.tet.2007.03.148
日期:2007.6
Cyclometalated platinum(II) 4,6-diphenyl-2,2′-bipyridine complex is supported on a commercially available cationic ion-exchange resin (amberlite IRA-200). Photophysical and ESR determinations indicate that the combined photosensitized system is able to generate singlet oxygen with high quantum yield upon irradiation of light in the visible region. The platinum(II) complex loaded on IRA-200 resin is
Ring-Opening Metathesis Polymer Sphere-Supported <i>s</i><i>eco</i>-Porphyrazines: Efficient and Recyclable Photooxygenation Catalysts
作者:Matthew J. Fuchter、Brian M. Hoffman、Anthony G. M. Barrett
DOI:10.1021/jo052156t
日期:2006.1.1
subsequently converted into its zinc seco-derivative. Polymerization gave the corresponding ROMPgel and ROMPsphere (ROMP = ring-opening metathesis polymer) reagents, the latter of which proved efficient as an immobilized catalyst for the sensitized production of singlet oxygen for the purification-minimized parallelsynthesis of endoperoxides and ene adducts.
Carbon–carbon bond scission during the reactions of allylic hydroperoxides with some transition metal compounds. Results relevant to a recent proposal
作者:John L. Courtneidge
DOI:10.1039/c39920000381
日期:——
range of alternative copper and iron reagents and with the previously examined reagents in the presence or absence of suitable traps: an acid-catalysed pathway is proposed to account for the observed scission reaction.
Sustainable photochemistry: solvent-free singlet oxygen-photooxygenation of organic substrates embedded in porphyrin-loaded polystyrene beadsDedicated to Professor Waldemar Adam on the occasion of his 65th birthday and his retirement from the stage of photooxygenation chemistry.
作者:Axel G. Griesbeck、Anna Bartoschek
DOI:10.1039/b204017d
日期:2002.7.11
A solvent-free photooxygenation process that uses organic substrates embedded in porphyrin-loaded polystyrene beads as solid support is described and applied for ene- and [4+2]-cycloaddition reactions involving singlet oxygen (1Δg).
IBX as a catalyst for dehydration of hydroperoxides: green entry to α,β-unsaturated ketones <i>via</i> oxygenative allylic transposition
作者:Tetsuya Kuga、Yusuke Sasano、Yoshiharu Iwabuchi
DOI:10.1039/c7cc08957k
日期:——
A catalytic transformation of allylic hydroperoxides into α,β-unsaturated carbonyl compounds using IBX as a dehydration catalyst is described. The combination of a singlet oxygen ene reaction and the IBX-catalyzed dehydration provides α,β-unsaturated carbonyl compounds from alkenes via oxygenativeallylictransposition with H2O as the only byproduct.