2406-25-9Relevant articles and documents
Trans-1,2-Disiloxybenzocyclobutene, an adequate partner for the auto-oxidation: EPR/spin trapping and theoretical studies
Drujon, Jean,Rahmani, Raphael,Heran, Virginie,Blanc, Romain,Carissan, Yannick,Tuccio, Beatrice,Commeiras, Laurent,Parrain, Jean-Luc
, p. 7513 - 7520 (2014)
The auto-oxidation of trans-1,2-disiloxybenzocyclobutene 1 was found to be very efficient, giving endo-peroxide 7 in quantitative yield. Each step of the mechanism of spin-forbidden addition of triplet oxygen O2( 3Σg) was
Hibbert et al.
, (1977)
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Mendenhall,G.D.,Ingold,K.U.
, p. 2963 - 2971 (1973)
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Intramolecular Hydrogen Atom Transfer in Aminyl Radical at Room Temperature with Large Kinetic Isotope Effect
Wang, Ying,Olankitwanit, Arnon,Rajca, Suchada,Rajca, Andrzej
, p. 7144 - 7147 (2017)
We report a large kinetic isotope effect at 298 K, kH/kD ≈ 150, associated with an intramolecular 1,5-hydrogen atom transfer (1,5-HAT) in the decay of a PEGylated carbazyl (aminyl) radical in solution. The experimental observations surprisingly combine the hallmarks of tunneling, including large KIEs and unusual activation parameters, with linear Arrhenius and Eyring plots over an exceptionally wide temperature range of 116 K.
Photoactivatable platinum anticancer complex can generate tryptophan radicals
Vallotto, Claudio,Shaili, Evyenia,Shi, Huayun,Butler, Jennifer S.,Wedge, Christopher J.,Newton, Mark E.,Sadler, Peter J.
, p. 13845 - 13848 (2018)
l-Tryptophan (Trp), melatonin (MLT) and the Trp-peptide pentagastrin quenched the formation of azidyl radicals generated on irradiation of the anticancer complex trans,trans,trans-[Pt(pyridine)2(N3)2(OH)2] with visible light, giving rise to C3-centred indole radicals which were characterized for Trp and MLT using an EPR spin-trap; indole, together with azidyl and hydroxyl radicals, have potential roles in a multitargeting mechanism of action against resistant cancers.
Reactions of Ruthenium Formyl and Related Complexes with Nitroxide Spin Traps
Smith, Garry,Sutcliffe, Leslie H.,Cole-Hamilton, David J.
, p. 1209 - 1214 (1984)
Reactions of the complexes trans- (dppe=Ph2PCH2CH2PPh2), cis- (dppm=Ph2PCH2PPh2), or trans- with ButNO give But2NO. and trans-tNO)(CO)(P-P)2>.+ (M=Ru, P-P=dppe or dppm; M=Os, P-P=dppe), the structures of which have been elucidated by e.s.r. and labelling (13C, 2H) studies. cis- or trans-+ gives only But2NO., whilst trans-2+ gives a mixture of trans-tNO)PPh2>>.2+ and a radical with the trap bound to a carbonyl carbon atom.The decomposition products of cis-+ gave a radical with the trap bound to the back-bone carbon atom of a chelating dppm ligand, whilst dppe and dppm both give radicals where the ButNO group is bound to a phosphorus atom.The mechanisms of some of these reactions are discussed.
Gasanov et al.
, (1977)
Taniguchi,Hatano
, p. 9 (1975)
1,3-Dipole Cycloaddition of Azides with Nitroso Compounds: ESR Studies
Kamigata, Nobumasa,Kawakita, Osamu,Izuoka, Akira,Kobayashi, Michio
, p. 398 - 400 (1985)
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An EPR study of the radical addition to 3-nitropentan-2-one as an archetype of α-carbonylnitroalkanes
Campredon, Mylene,Alberti, Angelo
, p. 289 - 297 (2014/06/09)
Carbon, silicon, germanium, tin and lead-centered radicals were reacted with 3-nitropentan-2-one and 3-nitropentan-2-ol inside the cavity of an electron paramagnetic resonance spectrometer. In all cases, selective addition to the nitrogroup was observed with detection of the corresponding oxynitroxide radicals. In the case of the carbonyl substrate, alkyl acyl nitroxides were also detected because of α-photocleavage. The oxynitroxides decayed with a first order kinetics via fragmentation of the carbon-nitrogen bond (denitration). Unexpectedly, the activation parameters were fairly similar to those previously reported for the corresponding tert-butyl oxynitroxides and almost independent from the presence of a carbonyl or a hydroxyl group on the carbon adjacent to the one bearing the nitrogroup. Copyright
