Effects of the Chalcogenide Identity in N‐Aryl Phenochalcogenazine Photoredox Catalysts
Sign Up to like & getrecommendations! Published in 2022 at "Chemcatchem"
DOI: 10.1002/cctc.202200485
Abstract: Phenochalcogenazines such as phenoxazines and phenothiazines have been widely employed as photoredox catalysts (PCs) in small molecule and polymer synthesis. However, the effect of the chalcogenide in these catalysts has not been fully investigated. In… read more here.
Keywords: effects chalcogenide; photoredox; identity aryl; aryl phenochalcogenazine ... See more keywords
Nickel Dual Photoredox Catalysis for the Synthesis of Aryl Amines
Sign Up to like & getrecommendations! Published in 2018 at "Organometallics"
DOI: 10.1021/acs.organomet.8b00121
Abstract: In this work, a new dual photoredox nickel catalysis system has been utilized for the synthesize of aryl amines. Previously, our group has shown that a nickel catalyst in conjunction with a photosensitizer and a… read more here.
Keywords: system; dual photoredox; catalysis; photoredox ... See more keywords
Redox-Neutral P(O)-N Coupling between P(O)-H Compounds and Azides via Dual Copper and Photoredox Catalysis.
Sign Up to like & getrecommendations! Published in 2020 at "Organic letters"
DOI: 10.1021/acs.orglett.0c02207
Abstract: We report a redox-neutral P(O)-N coupling reaction of P(O)-H compounds with azides via photoredox and copper catalysis, providing new access to useful phosphinamides, phosphonamides, and phosphoramides. This transformation tolerates a wide range of nucleophilic functionalities… read more here.
Keywords: neutral coupling; azides via; copper; compounds azides ... See more keywords
Ad Hoc Adjustment of Photoredox Properties by the Late-Stage Diversification of Acridinium Photocatalysts.
Sign Up to like & getrecommendations! Published in 2021 at "Organic letters"
DOI: 10.1021/acs.orglett.1c01673
Abstract: The steadily growing interest in substituting precious-metal photoredox catalysts with organic surrogates is vibrantly sustained by emerging methodologies to vary their photochemical behavior. Herein, we report an ad hoc approach for the preparation of acridinium… read more here.
Keywords: acridinium; late stage; stage diversification; acridinium photocatalysts ... See more keywords
Transition Metal-Free Supramolecular Photoredox Catalysis in Water: A Phenoxazine Photocatalyst Encapsulated in V-Shaped Aromatic Amphiphiles
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DOI: 10.1021/acscatal.0c04221
Abstract: An organic reaction in water using visible light as the only energy source is one of the goals of modern synthetic organic chemistry, and the encapsulation of a photoredox catalyst by a water-solub... read more here.
Keywords: transition metal; water; free supramolecular; catalysis ... See more keywords
Nonadiabatic Curve-Crossing Model for the Visible-Light Photoredox Catalytic Generation of Radical Intermediate via a Concerted Mechanism
Sign Up to like & getrecommendations! Published in 2018 at "ACS Catalysis"
DOI: 10.1021/acscatal.8b00601
Abstract: Photoredox catalysis relies on the excited-state single-electron transfer (SET) processes to drive a series of unique bond-forming reactions. In this work accurate electronic structure calculations at the CASPT2//CASSCF/PCM level of theory together with the kinetic… read more here.
Keywords: light photoredox; visible light; crossing model; photoredox ... See more keywords
Dual Photoredox/Nickel-Catalyzed Conversion of Aryl Halides to Aryl Aminooxetanes: Computational Evidence for a Substrate-Dependent Switch in Mechanism
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DOI: 10.1021/acscatal.9b03596
Abstract: A mild and direct strategy for the construction of aryl aminooxetanes has been accomplished through the synergistic combination of photoredox and nickel catalysis. This approach represents a rare example of harnessing challenging tertiary radicals in… read more here.
Keywords: photoredox nickel; aryl aminooxetanes; photoredox; nickel catalyzed ... See more keywords
New Synthetic Route to an Highly Efficient Photoredox Catalyst by Mechanosynthesis
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DOI: 10.1021/acsomega.8b01586
Abstract: Photoredox catalysis based on the [Cu(neo)(DPEphos)]BF4 copper complex allowed getting a significant improvement of the polymerization performances (e.g., thick samples, coatings...) compared to that obtained with other benchmarked photoinitiators in both cationic (CP) and free… read more here.
Keywords: synthetic route; mechanosynthesis; copper; photoredox ... See more keywords
Transition-Metal-Free Photoredox Phosphonation of Aryl C-N and C-X Bonds in Aqueous Solvent Mixtures.
Sign Up to like & getrecommendations! Published in 2022 at "ACS sustainable chemistry & engineering"
DOI: 10.1021/acssuschemeng.1c07394
Abstract: Herein, we present an efficient and mild methodology for the synthesis of aromatic phosphonate esters in good to excellent yields using 10H-phenothiazine, an inexpensive commodity chemical, as a photoredox catalyst. The reaction exhibits wide functional… read more here.
Keywords: phosphonation aryl; photoredox phosphonation; photoredox; metal free ... See more keywords
Umpolung Difunctionalization of Carbonyls via Visible-Light Photoredox Catalytic Radical-Carbanion Relay
Sign Up to like & getrecommendations! Published in 2020 at "Journal of the American Chemical Society"
DOI: 10.1021/jacs.0c00629
Abstract: The combination of photoredox catalysis with the Wolff–Kishner (WK) reaction allows the difunctionalization of carbonyl groups by a radical-carbanion relay sequence (photo-Wolff–Kishner reaction). Photoredox initiated radical addition to N-sulfonylhydrazones yields α-functionalized carbanions following the WK-type… read more here.
Keywords: carbanion relay; photoredox; reaction; radical carbanion ... See more keywords
Two-Photon Excitation Photoredox Catalysis Enabled Atom Transfer Radical Polymerization.
Sign Up to like & getrecommendations! Published in 2023 at "Journal of the American Chemical Society"
DOI: 10.1021/jacs.3c02832
Abstract: In recent years, metal-free photoredox-catalyzed atom transfer radical polymerization (O-ATRP) has gained wide attention because of its advantages (e.g., no metal contamination and mild reaction conditions). However, this traditional one-photon excitation catalysis has thermodynamic limits.… read more here.
Keywords: two photon; photoredox; photon excitation; photon ... See more keywords