Results 71 to 80 of about 3,887 (197)

Organoselenium-Catalyzed C2,3-Diarylation of N–H Indoles

An organoselenium-catalyzed C2,3-diarylation of unprotected N–H indoles with electron-rich aromatics has been developed. This one-pot multicomponent tandem cross-dehydrogenation coupling reaction allows for the incorporation of two different aromatic ...
Taoyuan Liang (4840839), Yingying Zhang (42910), Zongwu Wei (12213759), Zhuan Zhang (3355382), Xiaoxiang Zhang (628483), Junqiu Liao (16698080)   +5 more
core   +1 more source

The investigation of the antioxidative properties of the novel synthetic organoselenium compounds in some rat tissues [PDF]

, 2008
WOS: 000255321300011PubMed: 18375834DMBA (7,12-dimethylbenz[a]anthracene) is a polycyclic aromatic hydrocarbon (PAH) known to cause tumors in rats. Selenium is an essential element with physiological nonenzymatic antioxidant properties.
Talaş, Zeliha Selamoğlu, Gök, Yetkin, Yılmaz, İsmet, Örün, İbrahim, Yilmaz, Ismet, Özdemir, ilknur   +5 more
core   +1 more source

Synthesis of 3‐Chalcogenyl‐benzo[b]Chalcogenophenes via Chalcogenation/Cyclization of Alkynes Promoted by Selectfluor

Asian Journal of Organic Chemistry, Volume 15, Issue 8, August 2026.
A simple, mild, and safe electrophilic chalcogenocyclization reaction of a diverse array of alkynyl chalcogenoanisoles is depicted. The reactions are mediated by Selectfluor, as a stable, easy‐to‐handle, nontoxic, and safe oxidizing agent. Several 3‐chalcogenyl‐benzo[b]chalcogenophenes were obtained in moderate to excellent yields.
Jean C. Kazmierczak, Kelvin V. Hübner, Eduarda R. Fritz, Paola S. Hellwig, Claudio C. Silveira, Ricardo F. Schumacher   +5 more
wiley   +1 more source

Crystal structure of 1-{2-[(2-methoxyphenyl)selanyl]phenyl}-4-phenyl-1H-1,2,3-triazole

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, C21H17N3OSe, the dihedral angles between the central five-membered ring and the C- and N-bound rings are 17.89 (10) and 42.35 (10)°, respectively, indicating the molecule is twisted. The dihedral angle between the Se-bound rings is
Leandro R. S. Camargo, Julio Zukerman-Schpector, Anna M. Deobald, Antonio L. Braga, Edward R. T. Tiekink   +4 more
doaj   +1 more source

Organoselenium-Catalyzed Asymmetric Cyclopropanations of (E)‑Chalcones

We report a new class of chiral tetrahydroselenophene based on (S)-diphenyl­(tetrahydroselenophen-2-yl)­methanol, which was prepared from (R)-3-(3-bromopropyl)-2,2-diphenyloxirane and sodium selenide.
Rong-Jie Chein (1796227), Yu-Hsun Tseng (11529195), Pei-Tung Cheng (11529192)   +2 more
core   +1 more source

Catalytic Antioxidant Activity of Acyclic and Macrocyclic Selenides: Insights Into Structure–Activity Relationships and Mechanisms From Kinetic and Computational Studies

European Journal of Organic Chemistry, Volume 29, Issue 27, 17 July 2026.
Structure–activity relationships of antioxidant activities of selenides were established by experimental and computational methods. Several structures displayed strong catalytic activity in an NMR‐based assay. Diverse selenides were shown to act as potent catalytic antioxidants.
Adrian I. Doig, Wen Zhou, Thomas G. Back
wiley   +1 more source

Protective effects of organoselenium compounds against methylmercury-induced oxidative stress in mouse brain mitochondrial-enriched fractions

Brazilian Journal of Medical and Biological Research, 2011
We evaluated the potential neuroprotective effect of 1-100 µM of four organoselenium compounds: diphenyl diselenide, 3’3-ditri-fluoromethyldiphenyl diselenide, p-methoxy-diphenyl diselenide, and p-chloro-diphenyl diselenide, against methylmercury ...
D.F. Meinerz, M.T. de Paula, B. Comparsi, M.U. Silva, A.E. Schmitz, H.C. Braga, P.S. Taube, A.L. Braga, J.B.T. Rocha, A.L. Dafre, M. Farina, J.L. Franco, T. Posser   +12 more
doaj   +3 more sources

Solid-State 77Se NMR of Organoselenium Compounds through Cross Polarization Magic Angle Spinning (CPMAS) Method

Scientific Reports, 2017
Characterization of selenium states by 77Se NMR is quite important to provide vital information for mechanism studies in organoselenium-catalyzed reactions. With the development of heterogeneous polymer-supported organoselenium catalysts, the solid state
Duo Wei, Mengting Han, Lei Yu
doaj   +1 more source

Crystal structure and Hirshfeld surface analysis of (2E,2′E)-1,1′-[selenobis(4,1-phenylene)]bis[3-(4-chlorophenyl)prop-2-en-1-one]

Acta Crystallographica Section E: Crystallographic Communications, 2019
In the title compound, C30H20Cl2O2Se, the C—Se—C angle is 99.0 (2)°, with the dihedral angle between the planes of the attached benzene rings being 79.1 (3)°. The average endocyclic angles (Se—C—C) facing the Se atom are 122.1 (5) and 122.2 (5)°.
Hazem Bouraoui, Youcef Mechehoud, Souheyla Chetioui, Rachid Touzani, Meriem Medjani, Ahmed Benmilat, Ali Boudjada   +6 more
doaj   +1 more source

Thioredoxin Reductase as a Target for Antibacterial Gold Compounds in Burkholderia cenocepacia: Disclosing the Molecular Basis of Enzyme Inhibition

ChemBioChem, Volume 27, Issue 13, 14 July 2026.
The molecular basis of thioredoxin reductase inhibition by antibacterial gold(I) compounds is disclosed. X‐ray crystallography and high‐resolution ESI‐MS reveal selective gold coordination to catalytically relevant cysteine residues of Bc‐TrxR, leading to stable protein–gold adducts and disruption of enzyme redox activity.
Stefano Zineddu, José Aleixo de Azevedo‐França, Martina Aguanno, Valentina Pecchioli, Giarita Ferraro, Virginia Cuomo, Antonello Merlino, Luigi Messori   +7 more
wiley   +1 more source