Recent Advances in Copper-Catalyzed Carbon Chalcogenides Cross- Coupling Reactions DOI
Debasish Kundu, Totan Roy, Atanu Mahata

et al.

Current Organic Synthesis, Journal Year: 2022, Volume and Issue: 20(3), P. 267 - 277

Published: March 25, 2022

Cu-catalyzed carbon-heteroatom bond formation is a powerful tool in the field of organic synthesis. In past two decades, numerous Cu-based catalytic systems are developed both homogeneous and heterogeneous forms. Important developmentshave been reported on Cubased C-Chalcogenide cross-coupling last few decades. Where Cu/L-based found to perform reactions with high selectivity, supported-Cu nanoparticles under sustainable conditions recyclability systems. This present overview mainly focuses recent advances applications this fast-growing research an emphasis copper-catalyzed generations carbon-chalcogenide (S/Se/Te) bonds.

Language: Английский

Electrochemical regioselective C–H selenylation of 2H-indazole derivatives DOI

Shengsheng Lin,

Xiaomei Cheng,

Balati Hasimujiang

et al.

Organic & Biomolecular Chemistry, Journal Year: 2021, Volume and Issue: 20(1), P. 117 - 121

Published: Nov. 27, 2021

Selenium-substituted heteroarenes are biologically active compounds and useful building blocks. In this study, we have developed a metal- oxidant-free, environmentally friendly protocol for the regioselective selenylation of 2H-indazole derivatives by an electrochemical strategy. A number selenylated 2H-indazoles with wide range functional groups been synthesized in moderate to good yields under mild environment-friendly reaction conditions.

Language: Английский

Citations

37

Engineering Selenium Vacancies on CoSe2 Nanoarrays for Alkaline Hydrogen Evolution DOI
Xiaowei Pan,

Wen-Jun He,

Da Cao

et al.

ACS Applied Nano Materials, Journal Year: 2023, Volume and Issue: 6(3), P. 1724 - 1731

Published: Jan. 20, 2023

The development of highly efficient nonnoble metals toward hydrogen evolution reaction (HER) electrocatalysts is significant for producing via water electrolysis. Selenides are becoming increasingly attractive owing to their excellent HER activity. Herein, CoSe2 nanorods were successfully manufactured on a carbon cloth (CC) and selenium vacancies obtained using plasma cleaner (CoSe2-VSe/CC) enhance intrinsic catalytic synthetic catalyst exhibited lower overpotential 88 mV at 10 mA cm–2 in 1 M KOH high durability over 100 h cm–2, which can be ascribed the increased electrochemical surface area rapid electron transfer. In addition, density functional theory (DFT) calculations showed that introducing Se optimized adsorption energy site reduced transition-state barrier dissociation. This study laid firm foundation preparing high-performance stable anion defect engineering.

Language: Английский

Citations

17

Recent advances in selective mono-/dichalcogenation and exclusive dichalcogenation of C(sp2)–H and C(sp3)–H bonds DOI
Chang‐Sheng Wang, Yuan Xu, Shaopeng Wang

et al.

Organic & Biomolecular Chemistry, Journal Year: 2023, Volume and Issue: 22(4), P. 645 - 681

Published: Dec. 23, 2023

Organochalcogen compounds are prevalent in numerous natural products, pharmaceuticals, agrochemicals, polymers, biological molecules and synthetic intermediates. Direct chalcogenation of C-H bonds has evolved as a step- atom-economical method for the synthesis chalcogen-bearing compounds. Nevertheless, direct severely lags behind C-C, C-N C-O bond formations. Moreover, compared with monochalcogenation, reports selective mono-/dichalcogenation exclusive dichalcogenation relatively scarce. The past decade witnessed significant advancements various C(sp

Language: Английский

Citations

11

Selenium Modification of Natural Products and Its Research Progress DOI Creative Commons
Kaixuan Cheng, Yang Sun, Bowen Liu

et al.

Foods, Journal Year: 2023, Volume and Issue: 12(20), P. 3773 - 3773

Published: Oct. 13, 2023

The selenization of natural products refers to the chemical modification method artificially introducing selenium atoms into interact with functional groups in target molecule form selenides. Nowadays, even though scientists fields involving organic compounds have achieved numerous results due their continuous investment, few comprehensive and systematic summaries relating research can be found. present paper summarizes methods several kinds important products, such as polysaccharides, proteins/polypeptides, polyphenols, lipids, cyclic compounds, well basic principles or mechanisms selenizing methods. On this basis, explored future development trend field selenized it is hoped provide some suggestions for directional application active ingredients.

Language: Английский

Citations

9

Oxone® Mediated Regioselective C(sp2)−H Selenylation and Thiocyanation of Pyrazolo[1,5‐a]pyrimidines at Room Temperature DOI

Abhinay S. Chillal,

Rajesh T. Bhawale,

Umesh A. Kshirsagar

et al.

ChemistrySelect, Journal Year: 2024, Volume and Issue: 9(1)

Published: Jan. 2, 2024

Abstract A mild Oxone® mediated reaction for direct regioselective C−H selenylation and thiocyanation of pyrazolo[1,5‐ a ]pyrimidines is established at ambient temperature. This practical efficient methodology employs as user friendly, green, non‐toxic cheap reagent to facilitate room The present method offers high regioselectivity, broad substrate scope, conditions excellent yields. Further, this eco‐friendly approach could easily be extended other heterocycles. Mechanistic studies indicate that the occurs through electrophilic substitution mechanism via generation an chalcogen species.

Language: Английский

Citations

3

Recent advances in the synthesis and reactions of tellurium heterocycles DOI

Kokila Sakthivel,

R. Gana,

Fateh V. Singh

et al.

Advances in heterocyclic chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

Citations

0

tert‐Butyl Nitrite‐Mediated Deaminative Chalcogenation of Substituted 5‐Aminopyrazoles via Diaryl Dichalcogenides DOI

Farman Moh Abbasi,

Aritra Ghosh,

Ruchir Kant

et al.

ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(21)

Published: May 31, 2025

Abstract An expedited route to the synthesis of substituted 5‐(arylselanyl)‐1 H ‐pyrazoles and 5‐(arylthio)‐1 via reaction between 5‐amino‐1 bearing an electron withdrawing group (EWG) at C‐4 diaryl dichalcogenides in presence tert ‐butyl nitrite is described. The protocol compatible with substrates different EWGs, such as carboxylate, nitrile or phenylsulfonyl. strategy works even ‐1,2,3‐triazoles furnish corresponding chalcogenides. mechanism postulated involve a radical pathway.

Language: Английский

Citations

0

Metal-free C–Se cross-coupling enabled by photoinduced inter-molecular charge transfer DOI Creative Commons
Chen Zhu, Serik Zhumagazy, Huifeng Yue

et al.

Chemical Communications, Journal Year: 2021, Volume and Issue: 58(1), P. 96 - 99

Published: Nov. 29, 2021

Metal-free C-Se cross-couplings via the formation of electron-donor-acceptor (EDA) complexes have been developed. The visible-light induced reactions can be applied for synthesis a series unsymmetrical diaryl selenides employing aryl bromides, iodides as well chlorides under mild reaction conditions. scale-up was readily achieved. UV-Vis spectroscopy measurements provide insight into mechanism.

Language: Английский

Citations

20

Synthesis of 1,3-diselenyl-dihydroisobenzofurans via electrochemical radical selenylation with substituted o-divinylbenzenes and diselenides DOI
Ying Wang, Ning Xu, Weiwei Li

et al.

Organic & Biomolecular Chemistry, Journal Year: 2022, Volume and Issue: 20(14), P. 2813 - 2817

Published: Jan. 1, 2022

An efficient electrochemical method for the direct synthesis of complicated 1,3-diselenyl-dihydroisobenzofurans was developed under external oxidant free conditions at room temperature from substituted o-divinylbenzenes and diselenides. A radical mechanism is proposed this novel practical transformation.

Language: Английский

Citations

14

Catalyst- and metal-free C(sp2)–H bond selenylation of (N-hetero)-arenes using diselenides and trichloroisocyanuric acid at room temperature DOI Creative Commons
José S. S. Neto, Isis Juliane Arantes Granja, Marcos R. Scheide

et al.

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: Aug. 31, 2023

In this paper, we report an eco-friendly approach for the C(sp2)-H bond selenylation of imidazopyridines and other N-heteroarenes as well simple arenes at ambient temperature. This new protocol consists reaction between (N-hetero)-arenes diorganyl-diselenides trichloroisocyanuric acid (TCCA)-ethanol reagent system. a short time, desired selenylated products were obtained regioselectively in good yields, with tolerance wide range functional groups.

Language: Английский

Citations

8