Derivatives of Dihydropyrazine-1,4-Dioxide, 3-Imidazoline 3-Oxide, and α-Phenyl Nitrones with Functional Groups as New Spin Traps in Solution and in the Gas Phase
作者:Galina G. Dultseva、Galina I. Skubnevskaya、Aleksei Ya. Tikhonov、Dmitrii G. Mazhukin、Leonid B. Volodarsky
DOI:10.1021/jp960438e
日期:1996.1.1
The title compounds, acyclic phenyl nitrones with functional groups, cyclic dinitrones with conjugated or isolated double bonds, and imidazoline nitrones are studied as spin traps (ST) for short-lived free radicals (R) generated photochemically in solution and in the gas phase. New STs are efficient in trapping OH, hydroxyalkyl, or HO2 radicals. EPR spectra of the spin adducts (SA) of studied dinitrones are triplets of doublets characteristic of the nitroxides with one radical center. Imidazoline ST with amino nitrogen exhibits pH-dependent hyperfine splittings of its SAs. Some spin traps were shown to be efficient in detecting R in the atmospheric experiments.
Synthesis of 2,2,5,5-tetramethyl-3-imidazoline-1-oxyl
作者:V. A. Reznikov、L. A. Vishnivetskaya、L. B. Volodarskii
DOI:10.1007/bf00698954
日期:1993.5
Condensation of alpha-(hydroxylamino)-2-methylpropanal with acetone an ammonia afforded 2,2,5,5-tetramethyl-3-imidazoline-1-oxyl, the first member of a series of stable nitroxyl radicals which are derivatives of 3-imidazoline. It was shown that 2,2,5,5-tetramethyl-2,5-dihydropyrazine-1,4-dioxide can reversibly add two molecules of water or ammonia to the nitrone groups.
VOLODARSKIJ, L. B.;GRIGOREVA, L. N.;TIXONOV, A. YA., XIMIYA GETEROTSIKL. SOEDIN., 1983, N 10, 1414-1418
作者:VOLODARSKIJ, L. B.、GRIGOREVA, L. N.、TIXONOV, A. YA.
DOI:——
日期:——
Preparation of 2,3- and 2,5-dihydropyrazine 1,4-dioxides from 2-hydroxyamino-2-methylpropanal oxime and some of their properties
作者:L. B. Volodarskii、L. N. Grigor'eva、A. Ya. Tikhonov