scholarly journals Recent Advances of Dicyanopyrazine (DPZ) in Photoredox Catalysis

Photochem ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 237-246
Author(s):  
Vishal Srivastava ◽  
Pravin K. Singh ◽  
Arjita Srivastava ◽  
Surabhi Sinha ◽  
Praveen P. Singh
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Organic Synthesis ◽  
Chemical Environment ◽  
Organic Substrates ◽  
Photoredox Catalysis ◽  
Organic Transformations ◽  
Recent Advances ◽  
Invaluable Tool ◽  
Unique Chemical

Visible light organophotoredox catalysis has emerged as an invaluable tool for organic synthetic transformations since it works brilliantly in tandem with organic substrates and has been known to create unique chemical environment for organic transformations. Dicyanopyrazine (DPZ), a relatively lesser researched organophotoredox catalyst, has shown great potential through its catalytic activity in organic synthesis and necessitates attention of synthetic community.

Rhodamines as Photocatalyst in Organic Synthesis

2020 ◽  
Vol 07 ◽  
Author(s):  
Avik K. Bagdi ◽  
Papiya Sikdar
Keyword(s):  
Visible Light ◽  
Organic Synthesis ◽  
Organic Dyes ◽  
Transition Metal Catalysts ◽  
Visible Light Photocatalysis ◽  
Eosin Y ◽  
Organic Transformations ◽  
The Sustainable Development ◽  
Mechanistic Pathway ◽  
Green Model

Abstract:: Organic synthesis under environment friendly conditions has great impact in the sustainable development. In this context, visible light photocatalysis has emerged as a green model as this offers an energy-efficient pathway towards the organic transformation. Different transition-metal catalysts (Ir-, Ru-, Cu- etc) and organic dyes (eosin Y, rose bengal, methylene blue etc) are well-known photocatalysts in organic synthesis. Apart from the well-known organophotoredox catalysts, rhodamines (Rhodamine B and Rhodamine 6G) have been also employed as efficient photocatalysts for different organic transformations. In this review, we will focus on the photocatalysis by rhodamines in organic synthesis. Mechanistic pathway of the methodologies will also be discussed. We believe this review will stimulate the employment of rhodamines in the visible light photocatalysis for efficient organic transformations in the future.

Visible light photocatalysis in synthesis of pharmaceutically relevant heterocyclic scaffolds

2022 ◽  
Author(s):  
Vishal Srivastava ◽  
Pravin Kumar Singh ◽  
Shraddha Tivari ◽  
Praveen Pratap Singh
Keyword(s):  
Natural Products ◽  
Visible Light ◽  
Chemical Bond ◽  
Organic Synthesis ◽  
Bond Formation ◽  
Visible Light Photocatalysis ◽  
Photoredox Catalysis ◽  
Chemical Bond Formation

Visible light and photoredox catalysis have emerged as a powerful and long-lasting tool for organic synthesis, demonstrating the importance of a variety of chemical bond formation methods. Natural products, physiologically...

Recent Advances in Photoredox Catalysis Enabled Functionalization of α-Amino Acids and Peptides: Concepts, Strategies and Mechanisms

Synthesis ◽  
2019 ◽  
Vol 51 (14) ◽  
pp. 2759-2791 ◽  
Author(s):  
Jian-Quan Liu ◽  
Andrey Shatskiy ◽  
Bryan S. Matsuura ◽  
Markus D. Kärkäs
Keyword(s):  
Amino Acids ◽  
Visible Light ◽  
Hypervalent Iodine ◽  
Amino Acid Residues ◽  
Photoredox Catalysis ◽  
Metal Catalysis ◽  
Specific Amino Acid ◽  
Recent Advances ◽  
Redox Active ◽  
Decarboxylative Coupling

The selective modification of α-amino acids and peptides constitutes a pivotal arena for accessing new peptide-based materials and therapeutics. In recent years, visible light photoredox catalysis has appeared as a powerful platform for the activation of small molecules via single-electron transfer events, allowing previously inaccessible reaction pathways to be explored. This review outlines the recent advances, mechanistic underpinnings, and opportunities of applying photoredox catalysis to the expansion of the synthetic repertoire for the modification of specific amino acid residues.1 Introduction2 Visible-Light-Mediated Functionalization of α-Amino Acids2.1 Decarboxylative Functionalization Involving Redox-Active Esters2.2 Direct Decarboxylative Coupling Strategies2.3 Hypervalent Iodine Reagents2.4 Dual Photoredox and Transition-Metal Catalysis2.5 Amination and Deamination Strategies3 Photoinduced Peptide Diversification3.1 Gese-Type Bioconjugation Methods3.2 Peptide Macrocyclization through Photoredox Catalysis3.3 Biomolecule Conjugation through Arylation3.4 C–H Functionalization Manifolds4 Conclusions and Outlook

Recent advances in visible-light-mediated organic transformations in water

2021 ◽  
Author(s):  
Kai Sun ◽  
Qi-Yan Lv ◽  
Xiao-Lan Chen ◽  
Ling-Bo Qu ◽  
Bing Yu
Keyword(s):  
Energy Source ◽  
Visible Light ◽  
Reaction Medium ◽  
Organic Transformations ◽  
Recent Advances

Water is a green reaction medium, while visible light represents a renewable, clean, and abundant energy source. The recent advances in visible-light-mediated organic transformations in water are summarized.

Recent Advances and Perspectives in the Silver-catalyzed Multi-component Reactions

2020 ◽  
Vol 24 (3) ◽  
pp. 291-313
Author(s):  
G. S. Susan Treesa ◽  
Salim Saranya ◽  
Gopinadh Meera ◽  
Gopinathan Anilkumar
Keyword(s):  
Catalytic Activity ◽  
Organic Compounds ◽  
Organic Synthesis ◽  
Mild Conditions ◽  
Recent Advances ◽  
Scientific World ◽  
Comprehensive Study

The catalytic activity of silver and its salts in various reactions leads to a vast variety of organic compounds having significant applications in organic synthesis. This review gives a comprehensive study on silver-catalyzed multi-component reactions that attracted the interest of the scientific world through ecofriendly, atom-economic and mild conditions. The silver-catalyzed multi-component synthesis of organic compounds including aliphatic, aromatic and heterocycles are divided into subsections based on the types of bond formed and covers literature up to 2019.

1.9 Oxygen-Centered Radicals

2021 ◽  
Author(s):  
J. Zhang ◽  
D. Liu ◽  
Y. Chen
Keyword(s):  
Hydrogen Atom ◽  
Visible Light ◽  
Organic Synthesis ◽  
Reactive Intermediates ◽  
Radical Addition ◽  
Hydrogen Atom Transfer ◽  
Reaction Conditions ◽  
Recent Advances ◽  
Carbon Carbon Bonds ◽  
Induced Reaction

AbstractOxygen-centered radicals (R1O•) are reactive intermediates in organic synthesis, with versatile synthetic utilities in processes such as hydrogen-atom transfer (HAT), β-fragmentation, radical addition to unsaturated carbon–carbon bonds, and rearrangement reactions. In this review, we focus on recent advances in the generation and transformation of oxygen-centered radicals, including (alkyl-, α-oxo-, aryl-) carboxyl, alkoxyl, aminoxyl, phenoxyl, and vinyloxyl radicals, and compare the reactivity of oxygen-centered radicals under traditional reaction conditions with their reactivity under visible-light-induced reaction conditions.

The application of heterogeneous visible light photocatalysts in organic synthesis

2016 ◽  
Vol 6 (2) ◽  
pp. 349-362 ◽  
Author(s):  
Jun Chen ◽  
Jie Cen ◽  
Xiaoliang Xu ◽  
Xiaonian Li
Keyword(s):  
Visible Light ◽  
Organic Synthesis ◽  
Visible Light Photocatalysis ◽  
Recent Advances ◽  
Synthesis Reactions

The recent advances of organic synthesis reactions based on heterogeneous visible-light photocatalysis are reviewed.

Excited radical anions and excited anions in visible light photoredox catalysis

2019 ◽  
Vol 4 (12) ◽  
Author(s):  
Indrajit Ghosh
Keyword(s):  
Visible Light ◽  
Organic Synthesis ◽  
Transition Metal Complexes ◽  
Organic Dyes ◽  
Visible Light Photocatalysis ◽  
Radical Anions ◽  
Photoredox Catalysis ◽  
Inorganic Semiconductors ◽  
Redox Active ◽  
Excited Radical

Abstract Over the last decade, visible light photocatalysis has dramatically increased the arsenal of methods for organic synthesis and changed the way we activate molecules for chemical reactions. Polypyridyl transition metal complexes, redox-active organic dyes, and inorganic semiconductors are typically used as photocatalysts for such transformations. This chapter reviews the applications of radical anions and anions as photosensitizers in visible light photoredox catalysis.

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