Visible-light-induced decarboxylative acylation of quinoxalin-2(1H)-ones with α-oxo carboxylic acids under metal-, strong oxidant- and external photocatalyst-free conditions

Green Chemistry, Journal Year: 2020, Volume and Issue: 22(5), P. 1720 - 1725

Published: Jan. 1, 2020

An eco-friendly visible-light-induced decarboxylative acylation of quinoxalin-2(1H)-ones and α-oxo carboxylic acids with air as the oxidant under external-photocatalyst-free conditions was established.

Language: Английский

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The concept of dual roles design in clean organic preparation

Chinese Chemical Letters, Journal Year: 2019, Volume and Issue: 30(12), P. 2132 - 2138

Published: Sept. 19, 2019

Language: Английский

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Cp*M-Catalyzed Direct Annulation with Terminal Alkynes and Their Surrogates for the Construction of Multi-Ring Systems

ACS Catalysis, Journal Year: 2020, Volume and Issue: 10(17), P. 9747 - 9757

Published: Aug. 3, 2020

Transition-metal-catalyzed C–H activation followed by oxidative cyclization with unsaturated coupling partners has been a valuable synthetic tool for the multiring molecular scaffolds. This Perspective introduces recent progress on Cp*M-catalyzed (M = Co, Rh, and Ir) direct annulation of functionalized arenes terminal alkynes their equivalents through bond cleavage. The highlighted examples are categorized according to 10 different types reagents used in transformations. representative conditions, selected reaction scope, key mechanistic aspects briefly summarized.

Language: Английский

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Visible-light-initiated malic acid-promoted cascade coupling/cyclization of aromatic amines and KSCN to 2-aminobenzothiazoles without photocatalyst

Chinese Chemical Letters, Journal Year: 2020, Volume and Issue: 31(7), P. 1895 - 1898

Published: Feb. 8, 2020

Language: Английский

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Recent advances in Rh(iii)/Ir(iii)-catalyzed C–H functionalization/annulation via carbene migratory insertion

Organic & Biomolecular Chemistry, Journal Year: 2021, Volume and Issue: 19(7), P. 1438 - 1458

Published: Jan. 1, 2021

The review highlighted diverse annulations, including nitrogen, oxygen, sulfur heterocycles and carbocylizations via Rh(iii)/Ir(iii)-catalyzed C–H functionalization/annulation with various arene carbene precursors.

Language: Английский

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Visible-Light-Initiated Cross-Dehydrogenative Coupling of Quinoxalin-2(1H)-ones and Simple Amides with Air as an Oxidant

ACS Sustainable Chemistry & Engineering, Journal Year: 2019, Volume and Issue: 7(24), P. 19993 - 19999

Published: Nov. 8, 2019

By using ambient air as an oxidant, various N-acylated 3-aminoquinoxalin-2(1H)-ones were efficiently synthesized through visible-light-promoted rhodamine B-catalyzed amidation reaction of quinoxalin-2(1H)-ones and amides under metal-free strong oxidant-free conditions.

Language: Английский

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Application of sulfoxonium ylide in transition-metal-catalyzed C-H bond activation and functionalization reactions

Tetrahedron, Journal Year: 2021, Volume and Issue: 101, P. 132478 - 132478

Published: Oct. 8, 2021

Language: Английский

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The application of clean production in organic synthesis

Chinese Chemical Letters, Journal Year: 2021, Volume and Issue: 32(5), P. 1637 - 1644

Published: Feb. 26, 2021

Language: Английский

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Transition metal-catalyzed cross-coupling reactions of N-aryl-2-aminopyridines

RSC Advances, Journal Year: 2025, Volume and Issue: 15(2), P. 1134 - 1151

Published: Jan. 1, 2025

Due to the presence of pyridyl directing group, N-aryl-2-aminopyridines can quickly form stable complexes with metals, leading cyclization and functionalization reactions. A large number N-heterocycles nitrogen-based molecules be easily constructed via this direct atom-economical cross-coupling strategy. In review, we have highlighted transformations in various transition metal catalysts, such as palladium, rhodium, iridium, ruthenium, cobalt copper.

Language: Английский

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Rh(III)-Catalyzed Reaction of α-Carbonyl Sulfoxonium Ylides and Alkenes: Synthesis of Indanones via [4 + 1] Cycloaddition

Organic Letters, Journal Year: 2020, Volume and Issue: 22(4), P. 1375 - 1379

Published: Feb. 3, 2020

The synthesis of indanone derivatives by the Rh(III)-catalyzed reaction α-carbonyl sulfoxonium ylides with activated alkenes is reported. shows a high tolerance for functional groups and furnishes variety substituted via formal [4 + 1] cycloaddition. Highly stable were used as substrates in this C-H functionalization, their bifunctional character could be effectively exploited using Rh(III) catalysis sequential double C-C bond formation. Based on mechanistic studies including deuterium-labeling experiments, proposed to proceed follows: oxidative alkenylation β-hydride elimination, readdition H-Rh species, 1,2-carbon shift elimination DMSO, protonation.

Language: Английский

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