Application of Oxime Organic Dyes in Visible-Light-Induced Organic Synthesis

2018 ◽  
Vol 38 (11) ◽  
pp. 2807 ◽  
Author(s):  
Wenxiu Xu ◽  
Xiaoqiang Dai ◽  
Hanjing Xu ◽  
Jianquan Weng
Keyword(s):  
Visible Light ◽  
Organic Synthesis ◽  
Organic Dyes

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.

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.

scholarly journals Recent Advances on Metal-Free, Visible-Light- Induced Catalysis for Assembling Nitrogen- and Oxygen-Based Heterocyclic Scaffolds

Molecules ◽  
2019 ◽  
Vol 24 (8) ◽  
pp. 1533 ◽  
Author(s):  
Robert Pawlowski ◽  
Filip Stanek ◽  
Maciej Stodulski
Keyword(s):  
Visible Light ◽  
Organic Synthesis ◽  
Organic Dyes ◽  
Important Class ◽  
Special Interests ◽  
Controllable Synthesis ◽  
Metal Free ◽  
Wide Range ◽  
Low Costs ◽  
Mediated Catalysis

Heterocycles are important class of structures, which occupy a major space in the domain of natural and bioactive compounds. For this reason, development of new synthetic strategies for their controllable synthesis became of special interests. The development of novel photoredox systems with wide-range application in organic synthesis is particularly interesting. Organic dyes have been widely applied as photoredox catalysts in organic synthesis. Their low costs compared to the typical photocatalysts based on transition metals make them an excellent alternative. This review describes proceedings since 2015 in the area of application of metal-free, visible-light-mediated catalysis for assembling various heterocyclic scaffolds containing five- and six-membered rings bearing nitrogen and oxygen heteroatoms.

Photodegradation of organic dyes by PAN/SiO2-TiO2-NH2 nanofiber membrane under visible light

2019 ◽  
Vol 224 ◽  
pp. 509-514 ◽  
Author(s):  
Alaa Khalil ◽  
Nada M. Aboamera ◽  
Walaa S. Nasser ◽  
Walaa H. Mahmoud ◽  
Gehad G. Mohamed
Keyword(s):  
Visible Light ◽  
Organic Dyes ◽  
Nanofiber Membrane

scholarly journals Applications of organocatalysed visible-light photoredox reactions for medicinal chemistry

2018 ◽  
Vol 14 ◽  
pp. 2035-2064 ◽  
Author(s):  
Michael K Bogdos ◽  
Emmanuel Pinard ◽  
John A Murphy
Keyword(s):  
Pharmaceutical Industry ◽  
Transition Metals ◽  
Visible Light ◽  
Reaction Mechanisms ◽  
General Class ◽  
Medicinal Chemistry ◽  
Organic Dyes ◽  
General Reaction ◽  
High Degree ◽  
Synthetic Medicinal

The focus of this review is to provide an overview of the field of organocatalysed photoredox chemistry relevant to synthetic medicinal chemistry. Photoredox transformations have been shown to enable key transformations that are important to the pharmaceutical industry. This type of chemistry has also demonstrated a high degree of sustainability, especially when organic dyes can be employed in place of often toxic and environmentally damaging transition metals. The sections are arranged according to the general class of the presented reactions and the value of these methods to medicinal chemistry is considered. An overview of the general characteristics of the photocatalysts as well as some electrochemical data is presented. In addition, the general reaction mechanisms for organocatalysed photoredox transformations are discussed and some individual mechanistic considerations are highlighted in the text when appropriate.

scholarly journals Copper’s rapid ascent in visible-light photoredox catalysis

Science ◽  
2019 ◽  
Vol 364 (6439) ◽  
pp. eaav9713 ◽  
Author(s):  
Asik Hossain ◽  
Aditya Bhattacharyya ◽  
Oliver Reiser
Keyword(s):  
Visible Light ◽  
Organic Dyes ◽  
Low Cost ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Photoredox Catalysis ◽  
Cross Coupling Reactions ◽  
Rapid Ascent ◽  
Catalyzed Reactions ◽  
Metal Catalyzed

Visible-light photoredox catalysis offers a distinct activation mode complementary to thermal transition metal catalyzed reactions. The vast majority of photoredox processes capitalizes on precious metal ruthenium(II) or iridium(III) complexes that serve as single-electron reductants or oxidants in their photoexcited states. As a low-cost alternative, organic dyes are also frequently used but in general suffer from lower photostability. Copper-based photocatalysts are rapidly emerging, offering not only economic and ecological advantages but also otherwise inaccessible inner-sphere mechanisms, which have been successfully applied to challenging transformations. Moreover, the combination of conventional photocatalysts with copper(I) or copper(II) salts has emerged as an efficient dual catalytic system for cross-coupling reactions.

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