Visible light photoredox catalysis: applications in organic synthesis

Narayanam, Jagan M. R.; Stephenson, Corey R. J.

doi:10.1039/b913880n

Cited by 3,661 publications

(1,341 citation statements)

References 66 publications

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“…Initial investigations into the photoredox activation of TCTs was performed using an iridium complex ( fac ‐[Ir(ppy) 3 ], Ir (III) ),[[qv: 9a]] which has been extensively employed for a variety of organic transformations 23. With appropriate stoichiometry, Boyer and co‐workers demonstrated that these systems were able to furnish well‐defined polymers under irradiation from a blue LED ( λ max = 435 and 460 nm) for a variety of different monomers (both activated and less activated monomers).…”

Section: Tct Activation Via Photoredox Catalysismentioning

confidence: 99%

Beyond Traditional RAFT: Alternative Activation of Thiocarbonylthio Compounds for Controlled Polymerization

et al. 2016

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Recent developments in polymerization reactions utilizing thiocarbonylthio compounds have highlighted the surprising versatility of these unique molecules. The increasing popularity of reversible addition–fragmentation chain transfer (RAFT) radical polymerization as a means of producing well‐defined, ‘controlled’ synthetic polymers is largely due to its simplicity of implementation and the availability of a wide range of compatible reagents. However, novel modes of thiocarbonylthio activation can expand the technique beyond the traditional system (i.e., employing a free radical initiator) pushing the applicability and use of thiocarbonylthio compounds even further than previously assumed. The primary advances seen in recent years are a revival in the direct photoactivation of thiocarbonylthio compounds, their activation via photoredox catalysis, and their use in cationic polymerizations. These synthetic approaches and their implications for the synthesis of controlled polymers represent a significant advance in polymer science, with potentially unforeseen benefits and possibilities for further developments still ahead. This Research News aims to highlight key works in this area while also clarifying the differences and similarities of each system.

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Section: Tct Activation Via Photoredox Catalysismentioning

confidence: 99%

Beyond Traditional RAFT: Alternative Activation of Thiocarbonylthio Compounds for Controlled Polymerization

et al. 2016

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“…In the last three decades, photocatalytic processes promoted by semiconductors (SC) have found a widespread application in many fields, including water splitting, energy production, air and water purification, surface sterilization and organic synthesis (17)(18)(19)(20)(21)(22)(23). The reasons for this increasing interest in photocatalytic protocols are the growing demand for reducing environmental pollution and for developing more eco-friendly and cheaper processes.…”

Section: Photocatalytic Activity In Semiconductorsmentioning

confidence: 99%

Titanium Oxide Antibacterial Surfaces in Biomedical Devices

et al. 2011

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Int J Artif Organs ( 2011; : 9) 929-946 34 TITANIUM OXIDE AND ANTIBACTERIAL SURFACES IN BIOMEDICAL DEVICES Device-related infections: a clinical demand driving material science researchAn increasing number of clinical procedures requires the use of biomedical devices, whose widespread presence in modern therapeutic treatments is driving the demand for better performances and longer reliability. One of the major issues of both short-term devices and implantable prostheses is represented by device-related infections (DRIs) Accepted: August 31, 2011 rEViEW due to bacterial colonization and proliferation (1). About half of the 2 million cases of nosocomial infections that occur each year in the United States are associated with indwelling devices (2): these infections generally require a longer period of antibiotic therapy and repeated surgical procedures, resulting in potential risks for the patient and increased costs for the healthcare system. The planktonic bacteria that colonize a device surface tend to form a biofilm and the sessile bacterial cells, enclosed in a self-produced polymeric matrix of this kind, can withstand host immune responses and generally show extraordinary antibiotic resistance (3). Eventually, bacteria rapid multiply and disperse in planktonic form, giving rise

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“…[1][2][3][4][5][6][7][8][9] Ru-and Ir-based coordination complexes have received enormous attention because of their excellent visible-light-harvesting properties, modest to extremely high oxidation and reduction potentials, relatively long excited-state lifetimes, and reasonably good chemical and photostabilities under synthetic oxidative and reductive conditions. [2] In addition, considerable efforts have been made to develop metal-free photoredox catalytic methods with organic dyes [8,[10][11][12][13][14] such as eosin Y [10,11] or rhodamine derivatives [13,14] and organic heterogeneous photocatalysts [15] for synthetic transformations.…”

Section: Introductionmentioning

confidence: 99%

Anthraquinones as Photoredox Catalysts for the Reductive Activation of Aryl Halides

et al. 2017

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Quinones are ubiquitous in nature as structural motifs in natural products and redox mediators in biological electron-transfer processes. Although their oxidation properties have already been used widely in chemical and photochemical reactions, the applications of quinones in reductive photoredox catalysis are less explored. We report the visible-light photoreduction of aryl halides (Ar-X; X = Cl, Br, I) by 1,8-dihydroxyanthraquinone. The resulting aryl radical anions fragment into halide anions and aryl radicals, which react through hydrogen

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Visible light photoredox catalysis: applications in organic synthesis

Cited by 3,661 publications

References 66 publications

Beyond Traditional RAFT: Alternative Activation of Thiocarbonylthio Compounds for Controlled Polymerization

Beyond Traditional RAFT: Alternative Activation of Thiocarbonylthio Compounds for Controlled Polymerization

Titanium Oxide Antibacterial Surfaces in Biomedical Devices

Anthraquinones as Photoredox Catalysts for the Reductive Activation of Aryl Halides

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