Catalyzed C–H Activation and C–X (X= C, O, N, S, Halogen) Formation

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Catalysis in Organic and Polymer Chemistry".

Deadline for manuscript submissions: closed (30 November 2022) | Viewed by 4537

Special Issue Editor


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Guest Editor
Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
Interests: heterogeneous catalysis; coupling reactions and reduction reactions; C-H functionalization strategy; novel reaction media

Special Issue Information

Dear Colleagues,

The direct activation and functionalization of C–H bonds has become an attractive synthetic strategy for C–C and C–heteroatom bond formation. This approach avoids the use of pre-functionalized substrates and is also atom economical and step efficient, making it a suitable alternative for the greener and more energy efficient synthesis of target molecules such as intermediates, fine chemicals, pharmaceuticals, and natural products.

The C–H bond is ubiquitous, and the selective activation of this bond is the most important issue to consider when during these transformations. Although directing group assistance provides a good solution to the reactivity and the control of regioselectivity over a specific type of C–H bond, site-selective activation is still an ongoing challenge. Homogeneous catalysis based on transition metal complexes plays a predominant role due to the high activity of these complexes, which allow this type of reaction to conduct highly selective processes while under mild reaction conditions. Currently, a heterogeneous catalysis has been developed that is based on immobilized metal complexes or metal nanoparticles and that uses  greener solvents as well as an alternative energy source, all of which have improved the overall sustainability of the activation approach for C–H bonds.

This Special Issue aims to cover recent advances in regio- and stereoselective C–H functionalization that involves both C(sp2)–H and C(sp3)–H activation and that is involved with the formation of either C–C or C–heteroatom bonds.

Original research papers and topical reviews are welcome in this Special Issue of Catalysts. Submit your paper and select the Journal “Catalysts” and the Special Issue “Catalyzed C–H Activation and C–X (X= C, O, N, S, Halogen) Formation” via: MDPI submission system. Please contact the Guest Editor or the journal editor (rita.lin@mdpi.com) for any queries. Our papers will be published on a rolling basis and we will be pleased to receive your submission once you have finished it.

Prof. Dr. Oriana Piermatti
Guest Editor

Manuscript Submission Information

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Keywords

  • C(sp2)–H activation
  • C(sp3)–H activation
  • metal nanoparticles catalysts
  • metal complex catalysts
  • asymmetric C–H activation
  • green strategies

Published Papers (2 papers)

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Research

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10 pages, 3904 KiB  
Article
A HCl-Mediated, Metal- and Oxidant-Free Photocatalytic Strategy for C3 Arylation of Quinoxalin(on)es with Arylhydrazine
by Kai Wang, Wenjing Xu, Haoran Qi, Pengfei Zhang, Xian-Ting Cao and Guannan Wang
Catalysts 2022, 12(6), 633; https://doi.org/10.3390/catal12060633 - 10 Jun 2022
Cited by 5 | Viewed by 1918
Abstract
A novel and simple HCl-mediated, photocatalytic method for quinoxaline(on)es C3-H arylation with arylhydrazine under transition metal catalyst- and oxidant-free conditions is presented. Various quinoxaline(on)es underwent this transformation smoothly, demonstrating a broad substrate tolerance and providing the corresponding aryl products in moderate to excellent [...] Read more.
A novel and simple HCl-mediated, photocatalytic method for quinoxaline(on)es C3-H arylation with arylhydrazine under transition metal catalyst- and oxidant-free conditions is presented. Various quinoxaline(on)es underwent this transformation smoothly, demonstrating a broad substrate tolerance and providing the corresponding aryl products in moderate to excellent yields. Mechanistic studies indicated that a radical pathway may be involved in this transformation. Full article
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Review

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29 pages, 6421 KiB  
Review
Metal and Metal Oxide Nanoparticles Catalyzed C–H Activation for C–O and C–X (X = Halogen, B, P, S, Se) Bond Formation
by Federica Valentini, Oriana Piermatti and Luigi Vaccaro
Catalysts 2023, 13(1), 16; https://doi.org/10.3390/catal13010016 - 22 Dec 2022
Cited by 1 | Viewed by 2027
Abstract
The direct functionalization of an inactivated C–H bond has become an attractive approach to evolve toward step-economy, atom-efficient and environmentally sustainable processes. In this regard, the design and preparation of highly active metal nanoparticles as efficient catalysts for C–H bond activation under mild [...] Read more.
The direct functionalization of an inactivated C–H bond has become an attractive approach to evolve toward step-economy, atom-efficient and environmentally sustainable processes. In this regard, the design and preparation of highly active metal nanoparticles as efficient catalysts for C–H bond activation under mild reaction conditions still continue to be investigated. This review focuses on the functionalization of un-activated C(sp3)–H, C(sp2)–H and C(sp)–H bonds exploiting metal and metal oxide nanoparticles C–H activation for C–O and C–X (X = Halogen, B, P, S, Se) bond formation, resulting in more sustainable access to industrial production. Full article
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