Recyclable Copper Indium Sulfide Quantum Dots for Photocatalytic Homocoupling of Arenediazonium Tetrafluoroborates

ACS Sustainable Chemistry & Engineering, Год журнала: 2023, Номер 11(50), С. 17697 - 17707

Опубликована: Дек. 1, 2023

Copper indium sulfide quantum dots (QDs) were prepared by a solvothermal method and characterized X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, energy-dispersive techniques. The as-prepared CuInS2 QDs display excellent photocatalytic activity in the visible-light-driven homocoupling of arenediazonium tetrafluoroborates at room temperature. Various symmetrical biaryls obtained γ-valerolactone (GVL) good to yields under mild reaction conditions. In addition, photocatalyst, QDs, is stable catalytic process can be recycled least five times without significant losing its efficiency.

Язык: Английский

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Visible Light-Induced Radical Cascade Difluoromethylation/Cyclization of Unactivated Alkenes: Access to CF₂H-Substituted Polycyclic Imidazoles

ACS Omega, Год журнала: 2024, Номер 9(26), С. 28129 - 28143

Опубликована: Июнь 19, 2024

An efficient and mild protocol for the visible light-induced radical cascade difluoromethylation/cyclization of imidazoles with unactivated alkenes using easily accessible bench-stable difluoromethyltriphenylphosphonium bromide as precursor -CF

Язык: Английский

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Visible-light or sunlight photoredox-catalyzed β-selective acylation of alkenes to access α, β-unsaturated ketones

Organic Chemistry Frontiers, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

A general method for accessing α,β-unsaturated ketones through visible-light or sunlight photoredox-catalyzed β-selective acylation of alkenes has been developed.

Язык: Английский

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Copper(I)-Catalyzed Dearomatization of Benzofurans with 2-(Chloromethyl)anilines through Radical Addition and Cyclization Cascade

Organic Letters, Год журнала: 2024, Номер 26(2), С. 519 - 524

Опубликована: Янв. 8, 2024

Herein, we described a copper(I)-catalyzed dearomatization of benzofurans with 2-(chloromethyl)anilines to prepare various tetrahydrobenzofuro[3,2-

Язык: Английский

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Photocatalyst-free hydrothiolation of gem-difluoroalkenes with thiols

New Journal of Chemistry, Год журнала: 2024, Номер 48(20), С. 9000 - 9003

Опубликована: Янв. 1, 2024

A photocatalyst-free hydrothiolation reaction of aromatic gem -difluoroalkenes was developed under the irradiation blue light in dimethyl carbonate as a green solvent.

Язык: Английский

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Sequential Ring Opening/In Situ SO₂-Capture/Alkynylation of Cyclopropanols with Alkynyl Triflones Initiated by Energy Transfer

The Journal of Organic Chemistry, Год журнала: 2024, Номер 89(11), С. 7656 - 7661

Опубликована: Май 15, 2024

A visible-light-triggered ring opening/in situ SO2-capture/alkynylation sequence of cyclopropyl alcohols with alkynyl triflones using 4CzIPN as a triplet energy transfer photocatalyst is herein described. This metal-free protocol provides straightforward and atom-economical approach to alkynyl-substituted γ-keto sulfones broad scope substituents. In this transformation, could be used both radical acceptors SO2 donors. Preliminary experimental mechanistic studies synthetic utility are also demonstrated.

Язык: Английский

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General Defluoroalkylation of Trifluoromethylarenes with Both Electron-Donating and -Withdrawing Alkenes

The Journal of Organic Chemistry, Год журнала: 2024, Номер 89(17), С. 12591 - 12609

Опубликована: Авг. 14, 2024

The incorporation of gem-difluoromethylene units into organic molecules remains a formidable challenge. Conventional methodologies for constructing aryldifluoromethyl derivatives relied on the use high-functional fluorinating regents under harsh conditions. Herein, we report general and efficient photoredox catalytic systems defluoroalkylation readily available trifluoromethylarenes through selective C–F cleavage to deliver gem-difluoromethyl radicals which proceed reductive addition both electron-donating withdrawing alkenes transition-metal free Mechanistic studies reveal that thiol serves as photocatalyst HAT reagent visible light irradiation. This synergistic photocatalysis catalysis protocol exhibits ample salient features such high chemo- regioselectivity, broad substrate scope, amenable gram-scale synthesis late-stage modification bioactive molecules.

Язык: Английский

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Regioselective tandem sulfonylation/cyclization of unsaturated N-substituted enamides with sulfonyl chlorides by copper catalysis

Organic Chemistry Frontiers, Год журнала: 2024, Номер 11(20), С. 5784 - 5790

Опубликована: Янв. 1, 2024

The radical cascade cyclization of vinyl-tethered alkenes has become a promising tool for rapidly assembling nonbenzene-fused cyclic skeletons via the cracking alkenyl C–H bonds, but this approach been limited to generate five-membered rings.

Язык: Английский

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Decatungstate-photocatalyzed tandem acylation/cyclization/self-hydrogenation of isocyanides with aldehydes to hydroxyalkylated N-heteroarenes via multiple hydrogen atom transfer

Green Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

A 100% atom economical construction of hydroxyalkylated N-heteroarenes through decatungstate-catalyzed tandem cyclization/self-hydrogenation isocyanides and aldehydes under exogenous hydrogen reagent- byproduct-free conditions was developed.

Язык: Английский

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Catalyst-Free Synthesis of Novel α-Trifluoromethylated Tertiary Alcohols Bearing Azaarenes as Potential Antifungal Agents

Journal of Molecular Structure, Год журнала: 2024, Номер unknown, С. 140042 - 140042

Опубликована: Сен. 1, 2024

Язык: Английский

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