Eletrocarboxylation Reactions Using CO₂ Both as Promoter and Carboxylative Reagent

Chemistry - A European Journal, Год журнала: 2023, Номер 29(32)

Опубликована: Март 13, 2023

Electrocarboxylation reaction, which employs organic electrosynthesis to achieve the utilization of CO2 as a carboxylative reagent, provides powerful and efficient tool for preparation carboxylic acid. In some electrocarboxylation reactions, also acts promoter facilitate desired reaction. This concept mainly highlights recent -promoted reactions via CO2⋅- intermediate or transiently protective carboxylation active with .

Язык: Английский

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Photoinduced Difunctionalization of Diazenes Enabled by N–N Radical Coupling

Organic Letters, Год журнала: 2023, Номер 25(36), С. 6671 - 6676

Опубликована: Авг. 29, 2023

In this study, a metal-free difunctionalization strategy for diazenes was developed using range of bifunctionalization reagents. This involves unique N(sp3)–N(sp2) radical coupling between the hydrazine and imine radical. More than 30 triazane core motifs were constructed by installing imines various functional groups, including alkyl, phenyl, cyanoalkyl, sulfonyl on both ends nitrogen–nitrogen bond in an efficient manner.

Язык: Английский

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Photocatalytic Cross‐Pinacol Coupling Promoted by Carbon Dioxide**

Chemistry - A European Journal, Год журнала: 2023, Номер 29(44)

Опубликована: Май 26, 2023

Cross-pinacol coupling of two different carbonyl compounds was achieved through successive one-electron transfer processes under photocatalytic conditions. In the reaction, an umpoled anionic carbinol synthon generated in situ to react nucleophilically with a second electrophilic compound. It revealed that CO2 additive promoted generation suppress undesired radical dimerization. A wide variety aromatic and aliphatic substrates underwent cross-pinacol afford corresponding unsymmetric vicinal 1,2-diols, which even combination reactants similar structures such as aldehydes ketones were also well tolerated high cross-coupling selectivity.

Язык: Английский

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Modulating π − d Conjugated Coordination in Bionic Cu/Cu₂O Heterojunctions for Efficient Photodegradation of Organic Contaminants

Advanced Materials Technologies, Год журнала: 2025, Номер unknown

Опубликована: Март 23, 2025

Abstract In situ grown copper (Cu) metal is commonly integrated with Cu 2 O to enhance charge separation and improve photocatalytic degradation of azo dyes, such as Orange II Methyl orange (MO). However, limited solvent diffusion remains a critical challenge for effective pollutant removal. Inspired by the dandelion structure, this work synthesizes Cu/Cu composite an interconnected nanotube structure hollow nanosphere, facilitating transport increasing active surface area. The optimized O‐S3 catalyst achieves 93 % photodegradation efficiency maintains 98 stability over five cycles at concentration 100 mgL −1 , significantly outperforming MO. While previous studies have attributed performance dihedral angle planarity II, role photogenerated electron catalyst‐dye interface largely overlooked. Here, reveals that transfer from 3 d orbitals p energy levels N, C, atoms, enhancing carrier mobility binding interactions. Moreover, extra α‐OH group in promotes uniform electronic distribution planar π‐bond formation, further improving performance. These insights provide deeper understanding mechanisms offer valuable strategies designing more efficient catalysts.

Язык: Английский

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CO₂-facilitated radical sequential (3 + 2) annulation of 1,6-enynes via cooperation of sulfinate catalysis and photocatalysis

Green Chemistry, Год журнала: 2023, Номер 25(18), С. 7335 - 7343

Опубликована: Янв. 1, 2023

Reported here is the radical sequential (3 + 2) annulation of 1,6-enynes under concerted catalysis sulfinate and PC. Importantly, CO 2 as a green additive facilitates unusual 1,4-elimination via proton transfer to provide desulfonylated products.

Язык: Английский

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CO₂ and palladium enabled highly chemoselective hydroxylation of gem-difluorocyclopropanes

Organic Chemistry Frontiers, Год журнала: 2024, Номер 11(9), С. 2494 - 2501

Опубликована: Янв. 1, 2024

A mild chemoselective CO 2 and palladium mediated hydroxylation method of gem -difluorocyclopropanes is herein reported, in the presence water. broad functional group tolerance multiple mechanistic experiments are described discussed.

Язык: Английский

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CO₂-mediated isomerization of enamides

Green Chemistry, Год журнала: 2024, Номер 26(11), С. 6696 - 6703

Опубликована: Янв. 1, 2024

CO 2 -mediated Z to E isomerization of enamides assisted by electrocatalysis has been established, the key step relies on formation intermediates with via an unconventional C-centered mode, providing a series -enamides in good yield.

Язык: Английский

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Electrochemical Cyclization of o-Aminyl Azobenzenes: Roles of Aldehydes in N–N Bond Cleavage

Organic Letters, Год журнала: 2024, Номер 26(30), С. 6324 - 6329

Опубликована: Июль 22, 2024

Direct functionalization of azobenzenes provides an approach to obtaining valuable molecules in synthetic chemistry. However, efficient method for the cleavage N═N bond azobenzenes, which is a key process this transformation, still lacking. We herein disclose electrochemical reduction-induced cyclization with aldehydes via cleavage. This proceeds well absence any transition metals or external chemical oxidants, leading formation N-protected benzimidazoles moderate good yields.

Язык: Английский

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Arylazo sulfones: multifaceted photochemical reagents and beyond

Organic & Biomolecular Chemistry, Год журнала: 2023, Номер 22(5), С. 869 - 893

Опубликована: Дек. 25, 2023

The photochemical action of arylazo sulfones under visible light irradiation has recently gained considerable attention for the construction carbon-carbon and carbon-heteroatom bonds in organic synthesis. inherent dyedauxiliary group (-N

Язык: Английский

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F-doped carbon derived from asphalt by mechanochemical approach: More effective toward selective CO2 capture

Separation and Purification Technology, Год журнала: 2023, Номер 332, С. 125760 - 125760

Опубликована: Ноя. 17, 2023

Язык: Английский

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