Results 101 to 110 of about 12,240 (259)

mechanistic investigation of the oxidation of N,a-diphenylnitrones by dichloramine-T in aqueous acetonitrile medium – a non-linear Hammett plot [PDF]

Journal of the Serbian Chemical Society, 2009
The kinetics of oxidation of a number of meta- and para-substituted N,a-diphenylnitrones (nitrone) by dichloramine-T (DCT) was investigated in the presence of alkali in aqueous acetonitrile medium.
SUBRAMANIAN MANIVARMAN, GOVINDASAMY RAJARAJAN, GOVINDASAMY MANIKANDAN, MAHALIGAM SEKAR, JAYARAMAN JAYABHARATHI, VENUGOPAL THANIKACHALAM   +5 more
doaj  

Improved Dimethylzinc-Promoted Vinylation Of Nitrones With Vinylboronic Esters

, 2010
International audienceVinylboronic esters derived from 4,4,6-trimethyl-[1,3,2]dioxaborinane react with nitrones in the presence of dimethylzinc; nucleophilic addition of the vinyl group onto nitrones produces N-allylic hydroxylamines in fair yields.
de Candia, Cristina, Memboeuf, Antony, Gimbert, Yves, Chavant, Pierre Yves, Cristina de Candia, Yves Gimbert, György Lendvay, Lendvay, György, Nageswaran PraveenGanesh, Praveenganesh, Nageswaran, Antony Memboeuf, Pierre Y. Chavant   +11 more
core   +1 more source

Synthesis of a New Chiral Pyrrolidine

Molecules, 2010
The synthesis of a new chiral pyrrolidine has been performed using 2,3-O-isopropylidene-D-erythronolactol as a suitable starting material.
Pilar García, Enrique F. Iglesias, Isidro S. Marcos, Narciso M. Garrido, Rosalina F. Moro, Marta G. Núñez, Mari Fe. Flores, David Díez   +7 more
doaj   +1 more source

The Rearrangement of Oxaziridines to Nitrones Using HFIP as Solvent

, 2022
We developed a reaction to generate nitrones from oxaziridines using 1,1,1,3,3,3-hexafluoroisopropyl alcohol (HFIP) that possesses unique chemical properties.
김란희
core  

Enantioselective Metallophosphite-Catalyzed C-Acylation of Nitrones

, 2007
Metallophosphites derived from tartaric acid catalyze the enantioselective addition of acyl silanes to nitrones. The product alpha N-silyloxyamino ketones are obtained in moderate to good yields (36-94%) with excellent enantioselectivity (er >= 95:5).
James C. Tarr, Jeffrey S. Johnson, Tarr, James C., Garrett, Mary R., Mary R. Garrett, Johnson, Jeffrey S.   +5 more
core   +1 more source

Mechanisms of Antioxidant Action: Rubber-Bound Antioxidants Based on Nitrones—I. Non-Sulphur Vulcanizates

, 1979
The antioxidant activities of a number of N-phenyl nitrones containing phenolic functions were compared with N-methyl nitrones and conventional antioxidants in peroxide and TMTD sulphurless vulcanizates. The N-phenyl nitrones were found to be effectively
G. Scott, K. V. Smith
core   +1 more source

Benzoxazinic nitrones and nitroxides as possible antioxidants in biological systems

, 2013
Benzoxazinic nitrones and nitroxides are good antioxidants in model biological systems (micelles, lipoproteins, proteins, liposomes, sugars). With nitrones, this activity may be attributed to their radical trapping ability, whereas with nitroxides to ...
MOBBILI, Giovanna, PISANI, MICHELA, MARINI, MARIA GIOVANNA, CARLONI, PATRICIA, ASTOLFI, PAOLA, STIPA, Pierluigi   +5 more
core   +1 more source

Platinum-Catalyzed Oxoarylations of Ynamides with Nitrones

, 2016
A new platinum-catalyzed oxoarylation of ynamides with nitrones is reported. Cascade sequences for the synthesis of indolin-2-ones via NaBH3CN reduction in situ of the initially formed oxoarylation products are also ...
Chin-Jung Chang (1804006), Sabyasachi Bhunia (2029075), Rai-Shung Liu (1393513)   +2 more
core   +1 more source

Organocatalytic Enantioselective Dipolar [3+2]?Cycloadditions of Acetylenic Aldehydes with Nitrones for the Formation of Chiral 4-Isoxazolines

, 2012
The first organocatalytic enantioselective protocol has been developed for the dipolar [3+2]?cycloaddition between acetylenic aldehydes and nitrones through an iminium activation pathway.
Wang, Chao, Sun, J (reprint author), Chinese Acad Sci, Nat Prod Res Ctr, Chengdu Inst Biol, Chengdu 610041, Peoples R China., Cai, Xianrong, Sun, Jian   +3 more
core  

Silver-catalyzed cyclization of nitrones with 2-azetine: a radical approach to 2,3-disubstituted quinolines

, 2017
A silver-catalyzed intermolecular tandem cyclization of nitrones with 2-azetine was developed for the synthesis of 2,3-disubstituted quinolines under mild conditions with good yields.
Chunxiang Wang, Boshun Wan, Wan, Boshun, Xincheng Li, Yan, Hao, Li, Xincheng, Hao Yan, Wang, Chunxiang   +7 more
core   +1 more source