Results 31 to 40 of about 2,174 (182)

Visible light-promoted synthesis of 2-aryl-(3-organoselanyl)thieno[2,3-b]pyridines

Green Chemistry Letters and Reviews, 2022
We describe a simple and environment-friendly visible light-promoted protocol to access 2-aryl-(3-organoselanyl)thieno[2,3-b]pyridines, through the selenocyclization of 3-(arylethynyl)-2-(alkylthio)pyridines in the presence of diorganyl diselenides as ...
Ricardo Hellwig Bartz, Thiago Jacobsen Peglow, Filipe Penteado, Raquel Guimarães Jacob, Eder João Lenardão, Gelson Perin   +5 more
doaj   +1 more source

Catalyst- and metal-free C(sp 2)–H bond selenylation of (N-hetero)-arenes using diselenides and trichloroisocyanuric acid at room temperature

Scientific Reports, 2023
In this paper, we report an eco-friendly approach for the C(sp 2)–H bond selenylation of imidazopyridines and other N-heteroarenes as well as simple arenes at ambient temperature.
José S. S. Neto, Isis J. A. Granja, Marcos R. Scheide, Marcelo S. Franco, Cassio A. O. Moraes, Adilson Beatriz, Dênis P. de Lima, Giancarlo V. Botteselle, Tiago E. A. Frizon, Sumbal Saba, Jamal Rafique, Antonio L. Braga   +11 more
doaj   +1 more source

Efficient reductive selenation of aromatic aldehydes to symmetrical diselenides with Se/CO/H2O under atmospheric pressure

, 2004
An efficient method for the synthesis of symmetrical diselenides is described. Reductive selenation of aromatic and heterocyclic aromatic aldehydes (ArCHO) with Se/CO/H2O in DMF afforded diselenides (ArCH2SeSeCH2Ar) in yields up to 94% under atmospheric ...
Lu, SW, Yu, ZK, Tian, FS
core   +1 more source

Facile Access to 2-Selenoxo-1,2,3,4-tetrahydro-4-quinazolinone Scaffolds and Corresponding Diselenides via Cyclization between Methyl Anthranilate and Isoselenocyanates: Synthesis and Structural Features

Molecules, 2022
A practical method for the synthesis of 2-selenoxo-1,2,3,4-tetrahydro-4-quinazolinone was reported. The latter compounds were found to undergo facile oxidation with H2O2 into corresponding diselenides.
Vladimir K. Osmanov, Evgeniy V. Chipinsky, Victor N. Khrustalev, Alexander S. Novikov, Rizvan Kamiloglu Askerov, Alexander O. Chizhov, Galina N. Borisova, Alexander V. Borisov, Maria M. Grishina, Margarita N. Kurasova, Anatoly A. Kirichuk, Alexander S. Peregudov, Andreii S. Kritchenkov, Alexander G. Tskhovrebov   +13 more
doaj   +1 more source

Intermolecular Bonding Interactions Within Acenaphthene Peri-Diselenide Radical Cations: Combining Chalcogen Bonding and Pancake Bonding

Crystals
Cyclic 1,2-diselenides are known to exhibit three σ-holes around the Se atoms—two in the prolongation of the Se–Se bond and one merging the two electron-depleted areas in the prolongation of the C–Se bonds.
Hrudya Pariyacheri Padikkal, Olivier Jeannin, Nicolas Quéméré, Ie-Rang Jeon, Marc Fourmigué   +4 more
doaj   +1 more source

Diferrocenyl diselenides: excellent thiol peroxidase-like antioxidants

, 1998
Synthesis, structure and thiol peroxidase-like antioxidant activity of several diaryl diselenides having intramolecularly coordinating amino groups are described; the diselenides having both tertiary amino groups and redox-active ferrocenyl units show ...
Mugesh, G., PUNEKAR, NS, Butcher, Ray J., SINGH, HB, Singh, Harkesh B., PANDA, A, Punekar, Narayan S., MUGESH, G, BUTCHER, RJ, Panda, Arunashree   +9 more
core   +1 more source

Light‐Driven Diselenide Metathesis in Peptides

ChemistryOpen, 2019
Peptides containing selenocysteine moieties are susceptible to non‐catalytic reactions of diselenide bonds metathesis induced by visible light. In contrast to previously reported radical metathesis of disulfide bridges in cysteine derivatives, this newly
Dr. Mateusz Waliczek, M.Sc. Özge Pehlivan, Prof. Piotr Stefanowicz   +2 more
doaj   +1 more source

An Improved Synthesis of Symmetrical Diselenides from Aromatic Aldehydes

, 2010
An improved method for the synthesis of symmetrical diselenides is described. Reductive selenation of aromatic aldehydes with Se/CO/H2O/Et3N system in THF gave the corresponding aromatic diselenides in good ...
Chen, Yahong, Song, Maoping, Lu, Shiwei, Tian, Fengshou   +3 more
core   +1 more source

Developments in Synthetic Application of Selenium(IV) Oxide and Organoselenium Compounds as Oxygen Donors and Oxygen-Transfer Agents

Molecules, 2015
A variety of selenium compounds were proven to be useful reagents and catalysts for organic synthesis over the past several decades. The most interesting aspect, which emerged in recent years, concerns application of hydroperoxide/selenium(IV) oxide and ...
Jacek Młochowski, Halina Wójtowicz-Młochowska   +1 more
doaj   +1 more source

Chemical Strategies for Multistimuli Responsive Dynamic Covalent Materials in Regenerative Medicine

Advanced Healthcare Materials, EarlyView.
Multistimuli responsive dynamic covalent materials integrate reversible chemistry with the complex chemical, mechanical, and biochemical cues of regenerative environments. This review highlights chemical strategies based on orthogonal dynamic bonds, multicomponent networks, and hierarchical architectures to regulate mechanics, degradation, and ...
Saurabh Joshi, Matthew B. Baker, Dominik Schauenburg   +2 more
wiley   +1 more source