Semi-heterogeneous g-C <sub>3</sub>N <sub>4</sub>/NaI dual catalytic C–C bond formation under visible light

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Abstract

The semi-heterogeneous g-C ₃N ₄/NaI dual catalytic system driven C–C bond formation between quinoxalin-2(1 H)-ones and arylhydrazines under blue light irradiation is reported for the first time.

Abstract

The semi-heterogeneous g-C ₃N ₄/NaI dual catalytic system-driven C–C bond formation between quinoxalin-2(1 H)-ones and arylhydrazines under blue light irradiation has been reported for the first time. The photo-generated hole acted as a traceless oxidant to turn over the iodide salt redox catalyst cycle and the photo-generated electron served as a clean reductant to promote the bond formation process. A wide range of 3-arylquinoxaline-2 (1 H)-ones were obtained in high yields with excellent functional group tolerance.

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In this review, we highlight the use of organic photoredox catalysts in a myriad of synthetic transformations with a range of applications. This overview is arranged by catalyst class where the photophysics and electrochemical characteristics of each is discussed to underscore the differences and advantages to each type of single electron redox agent. We highlight both net reductive and oxidative as well as redox neutral transformations that can be accomplished using purely organic photoredox-active catalysts. An overview of the basic photophysics and electron transfer theory is presented in order to provide a comprehensive guide for employing this class of catalysts in photoredox manifolds.

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g-C3 N4 -Based Heterostructured Photocatalysts

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Carbon-Carbon Bond Forming Reactions via Photogenerated Intermediates.

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The present review offers an overview of the current approaches for the photochemical and photocatalytic generation of reactive intermediates and their application in the formation of carbon-carbon bonds. Valuable synthetic targets are accessible, including arylation processes, formation of both carbo- and heterocycles, alpha- and beta-functionalization of carbonyls, and addition reactions onto double and triple bonds. According to the recent advancements in the field of visible/solar light catalysis, a significant part of the literature reported herein involves radical ions and radicals as key intermediates, with particular attention to the most recent examples. Synthetic application of carbenes, biradicals/radical pairs and carbocations have been also reported.

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Author and article information

Contributors

Chao Wu: (View ORCID Profile)

Wei-Min He: (View ORCID Profile)

Journal

Journal ID (publisher-id): GRCHFJ

Title: Green Chemistry

Abbreviated Title: Green Chem.

Publisher: Royal Society of Chemistry (RSC)

ISSN (Print): 1463-9262

ISSN (Electronic): 1463-9270

Publication date Created: April 24 2023

Publication date (Electronic): 2023

Volume: 25

Issue: 8

Pages: 3292-3296

Affiliations

[1 ]School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China

[2 ]National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Nanjing Forestry University, Nanjing 210037, China

Article

DOI: 10.1039/D2GC04843D

SO-VID: 40093413-7f74-4cf4-8eff-c30348e0a4ac

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http://rsc.li/journals-terms-of-use

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