Recent advances in sulfonylation reactions using potassium/sodium metabisulfite

Chemical Communications, Journal Year: 2020, Volume and Issue: 56(30), P. 4145 - 4155

Published: Jan. 1, 2020

Recently, sulfonylation reactions using potassium/sodium metabisulfite as the sulfur dioxide surrogate have been developed rapidly. In most cases, transformations go through radical processes with insertion of under mild conditions. Additionally, transition metal catalysis is applied in for synthesis sulfonyl-containing compounds. Among approaches, photoinduced conversions visible light or ultraviolet irradiation are also involved. this updated report, from potassium sodium summarized.

Language: Английский

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Multicomponent reactions and photo/electrochemistry join forces: atom economy meets energy efficiency

Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 51(6), P. 2313 - 2382

Published: Jan. 1, 2022

Visible-light photoredox catalysis has been regarded as an extremely powerful tool in organic chemistry, bringing the spotlight back to radical processes. The versatility of photocatalyzed reactions already demonstrated be effective providing alternative routes for cross-coupling well multicomponent reactions. photocatalyst allows generation high-energy intermediates through light irradiation rather than using highly reactive reagents or harsh reaction conditions. In a similar vein, electrochemistry experienced fruitful renaissance generating without need any catalyst. Such milder approaches pose basis toward higher selectivity and broader applicability. electrochemical reactions, species acts starter cascade events. This diverse reactivity use is usually not covered by classical methods. Owing availability cheaper more standardized photo- reactors, easily scalable flow-setups, it surprising that these two fields have become areas increased research interest. Keeping view, this review aimed at overview synthetic design MCRs involving and/or activation crucial step with particular focus on choice difunctionalized reagent.

Language: Английский

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Recent advances in visible-light-mediated organic transformations in water

Green Chemistry, Journal Year: 2020, Volume and Issue: 23(1), P. 232 - 248

Published: Dec. 11, 2020

Water is a green reaction medium, while visible light represents renewable, clean, and abundant energy source. The recent advances in visible-light-mediated organic transformations water are summarized.

Language: Английский

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Building a Pyrazole–Benzothiadiazole–Pyrazole Photosensitizer into Metal–Organic Frameworks for Photocatalytic Aerobic Oxidation

Journal of the American Chemical Society, Journal Year: 2021, Volume and Issue: 143(50), P. 21340 - 21349

Published: Dec. 8, 2021

Charge separation plays a crucial role in regulating photochemical properties and therefore warrants consideration designing photocatalysts. Metal-organic frameworks (MOFs) are emerging as promising candidates for heterogeneous photocatalysis due to their structural designability tunability of photon absorption. Herein, we report the design pyrazole-benzothiadiazole-pyrazole organic molecule bearing donor-acceptor-donor conjugated π-system fast charge separation. Further attempts integrate such photosensitizer into MOFs afford more effective photocatalyst (JNU-204). Under visible-light irradiation, three aerobic oxidation reactions involving different oxygenation pathways were achieved on JNU-204. Recycling experiments conducted demonstrate stability reusability JNU-204 robust photocatalyst. Furthermore, illustrate its applications facile synthesis pyrrolo[2,1-a]isoquinoline-containing heterocycles, core skeletons family marine natural products. is an exemplary MOF platform with good absorption, suitable band gap, separation, extraordinary chemical proceeding under irradiation.

Language: Английский

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Visible light-induced recyclable g-C₃N₄ catalyzed thiocyanation of C(sp²)–H bonds in sustainable solvents

Green Chemistry, Journal Year: 2021, Volume and Issue: 23(10), P. 3677 - 3682

Published: Jan. 1, 2021

A metal-free photocatalytic strategy for the preparation of thiocyanated heterocycles from inexpensive NH₄SCN has been developed using carbon nitride (g-C₃N₄) as a general heterogeneous catalyst.

Language: Английский

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A Need for Caution in the Preparation and Application of Synthetically Versatile Aryl Diazonium Tetrafluoroborate Salts

Organic Letters, Journal Year: 2020, Volume and Issue: 22(18), P. 7057 - 7059

Published: Aug. 28, 2020

ADVERTISEMENT RETURN TO ISSUEEditorialNEXTA Need for Caution in the Preparation and Application of Synthetically Versatile Aryl Diazonium Tetrafluoroborate SaltsJames D. FirthJames FirthDepartment Chemistry, University York, Heslington, York YO10 5DD, U.K.More by James Firthhttp://orcid.org/0000-0003-2283-552X Ian J. S. Fairlamb*Ian FairlambDepartment U.K.*Email: [email protected]More Fairlambhttp://orcid.org/0000-0002-7555-2761Cite this: Org. Lett. 2020, 22, 18, 7057–7059Publication Date (Web):August 28, 2020Publication History Received11 August 2020Published online28 inissue 18 September 2020https://pubs.acs.org/doi/10.1021/acs.orglett.0c02685https://doi.org/10.1021/acs.orglett.0c02685editorialACS PublicationsCopyright © 2020 American Chemical Society. This publication is available under these Terms Use. Request reuse permissions free to access through this site. Learn MoreArticle Views19973Altmetric-Citations77LEARN ABOUT THESE METRICSArticle Views are COUNTER-compliant sum full text article downloads since November 2008 (both PDF HTML) across all institutions individuals. These metrics regularly updated reflect usage leading up last few days.Citations number other articles citing article, calculated Crossref daily. Find more information about citation counts.The Altmetric Attention Score a quantitative measure attention that research has received online. Clicking on donut icon will load page at altmetric.com with additional details score social media presence given article. how calculated. Share Add toView InAdd Full Text ReferenceAdd Description ExportRISCitationCitation abstractCitation referencesMore Options onFacebookTwitterWechatLinked InRedditEmail (640 KB) Get e-AlertscloseSUBJECTS:Anions,Explosives,Materials,Organic reactions,Salts e-Alerts

Language: Английский

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Difunctionalization of Alkenes and Alkynes via Intermolecular Radical and Nucleophilic Additions

Molecules, Journal Year: 2020, Volume and Issue: 26(1), P. 105 - 105

Published: Dec. 28, 2020

Popular and readily available alkenes alkynes are good substrates for the preparation of functionalized molecules through radical and/or ionic addition reactions. Difunctionalization is a topic current interest due to its high efficiency, substrate versatility, operational simplicity. Presented in this article followed by oxidation nucleophilic reactions difunctionalization or alkynes. The could be accomplished 1,2-addition (vicinal) 1,n-addition (distal remote) if H-atom group-transfer involved reaction process. A wide range moieties, such as alkyl (R), perfluoroalkyl (Rf), aryl (Ar), hydroxy (OH), alkoxy (OR), acetatic (O2CR), halogenic (X), amino (NR2), azido (N3), cyano (CN), well sulfur- phosphorous-containing groups can incorporated Radicals generated from peroxides single electron transfer (SET) agents, under photoredox electrochemical employed

Language: Английский

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A metal-free route to alkynyl sulfones under photoinduced conditions with the insertion of sulfur dioxide

Green Chemistry, Journal Year: 2020, Volume and Issue: 22(6), P. 1906 - 1910

Published: Jan. 1, 2020

A metal-free route to alkynyl sulfones under photoinduced conditions is accomplished, starting from 4-alkyl Hantzsch esters, sulfur dioxide, and bromides visible light irradiation at room temperature.

Language: Английский

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Photo-Ni-Dual-Catalytic C(sp²)–C(sp³) Cross-Coupling Reactions with Mesoporous Graphitic Carbon Nitride as a Heterogeneous Organic Semiconductor Photocatalyst

ACS Catalysis, Journal Year: 2020, Volume and Issue: 10(6), P. 3526 - 3532

Published: Feb. 13, 2020

The synergistic combination of a heterogeneous organic semiconductor mesoporous graphitic carbon nitride (mpg-CN) and homogeneous nickel catalyst with visible-light irradiation at room temperature affords the C(sp2)–C(sp3) cross-coupling aryl halides potassium alkyl trifluoroborates by single electron transmetallation. Like homogeneously catalyzed protocol, reaction is compatible variety functional groups including electron-donating electron-withdrawing heteroaryl moieties. Moreover, this protocol allows installation allyl onto (hetero)arenes, enlarging scope method. mpg-CN photocatalyst easily recovered from mixture reused several times, paving way for larger-scale industrial applications type photocatalytic bond-forming reactions.

Language: Английский

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Recent advances in visible-light graphitic carbon nitride (g-C₃N₄) photocatalysts for chemical transformations

RSC Advances, Journal Year: 2022, Volume and Issue: 12(28), P. 18245 - 18265

Published: Jan. 1, 2022

Graphitic carbon nitride (g-C 3 N 4 ) has emerged as a new research hotspot, attracting broad interdisciplinary attention in the form of metal-free and visible-light-responsive photocatalysts.

Language: Английский

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