A carbazole-based fully conjugated sp²c D–A covalent organic polymer for visible light mediated photocatalytic degradation of rhodamine B and Rose Bengal

Materials Advances, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

We demonstrate that the sp 2 carbon-linked carbazole based covalent organic polymer is a potential photocatalyst for remediation of dyes such as rhodamine B and Rose Bengal.

Language: Английский

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Visible-Light-Promoted α-C(sp³)–H Amidation of Cyclic Ethers under Redox-Neutral Conditions

Organic Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Reported herein is a visible-light-promoted strategy for the α-C(sp3)–H amidation of cyclic ethers using N-acyloxyamide as an oxidative amidating reagent. This transformation provides straightforward approach to various α-amidated under metal- and additive-free conditions. The synthetic utility products was demonstrated through facile transformations, including reduction, allylation, acylation, sulfonamidation, gram-scale reactions. Preliminary mechanistic studies suggest radical/radical cross-coupling process, with C(sp3)–H bond cleavage identified rate-determining step.

Language: Английский

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Recent advances of 9-fluorenone in photoredox catalysis

Molecular Catalysis, Journal Year: 2025, Volume and Issue: 582, P. 115169 - 115169

Published: May 8, 2025

Language: Английский

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Rose bengal photocatalyzed expeditious multicomponent synthesis of 3,4‐dihydropyrimidin‐2‐(1H)‐ones/thiones under visible light irradiation

Journal of Heterocyclic Chemistry, Journal Year: 2024, Volume and Issue: 61(9), P. 1455 - 1461

Published: July 10, 2024

Abstract The combination of visible light, a renewable and green energy source, rose bengal, non‐toxic organic dye as photoredox catalyst, is an easy efficient method for synthesizing 3,4‐dihydropyrimidin‐2(1 H )‐ones/thiones in EtOH at ambient temperature very short reaction time. present work offers simple operation, workup, rapid conversion, excellent product yields, while accommodating wide range substrates. Rose bengal‐based photocatalytic approach permits foremost sustainability, which delivers economic environmental rewards.

Language: Английский

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Investigation of Heavy Atom Effects and pH Sensitivity on the Photocatalytic Cross-Dehydrogenative Coupling Reaction of Halogenated Fluorescein dyes

Dyes and Pigments, Journal Year: 2024, Volume and Issue: 232, P. 112437 - 112437

Published: Sept. 7, 2024

Language: Английский

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Synthesis of diarylsulphide/diarylselenide embedded pyrazole-fused isocoumarins and isatin/ninhydrin hydrazones via acid catalyzed solvent and temperature controlled reactions

Organic & Biomolecular Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 11, 2024

Room temperature stirring of a mixture chalcogenated arylhydrazones and ninhydrin in dichloromethane (DCM) the presence acid leads to formation pyrazole-fused isocoumarins, substituted with diarylsulphide/diarylselenide moiety. On other hand, refluxing same protic polar solvent ethanol produces containing hydrazones. Further study reveals that, like ninhydrin, isatin can also generate corresponding hydrazones at C-3 position under similar reaction conditions.

Language: Английский

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Visible Light‐Driven Glycosylation Mediated by Trifluoromethyl Thianthrenium Triflate with Thioglycoside Donors

European Journal of Organic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 23, 2024

Abstract An efficient photoredox‐catalyzed glycosylation using a p ‐tolyl thioglycoside donor in the presence of trifluoromethyl thianthrenium triflate (TT‐CF 3 + TfO − ) has been investigated. This approach involves generating radical via single electron transfer between TT‐CF and photocatalyst Rose Bengal, thereby activating thioglycosides facilitating glycosylation. method operates under mild reaction conditions tolerates variety functional groups.

Language: Английский

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