Visible Light-Induced Radical Addition/Annulation to Construct Phenylsulfonyl-Functionalized Dihydrobenzofurans Involving an Intramolecular 1,5-Hydrogen Atom Transfer Process

2020 ◽  
Vol 22 (22) ◽  
pp. 8774-8779 ◽  
Author(s):  
Shentong Xie ◽  
Yifan Li ◽  
Ping Liu ◽  
Peipei Sun
Keyword(s):  
Hydrogen Atom ◽  
Visible Light ◽  
Transfer Process ◽  
Radical Addition ◽  
Hydrogen Atom Transfer ◽  
Atom Transfer

Carbonylative Coupling of Simple Alkanes and Alkenes Enabled by Organic Photoredox Catalysis

2021 ◽  
Author(s):  
Ling Chen ◽  
Jing Hou ◽  
Ming Zheng ◽  
Le-Wu Zhan ◽  
Wan-Ying Tang ◽  
...  
Keyword(s):  
Hydrogen Atom ◽  
Visible Light ◽  
Transfer Process ◽  
Hydrogen Atom Transfer ◽  
Atom Transfer ◽  
Photoredox Catalysis ◽  
Visible Light Driven

A visible-light-driven direct carbonylative coupling of simple alkanes and alkenes via the combination of the hydrogen atom transfer process and photoredox catalysis has been demonstrated. Employing the N-alkoxyazinium salt as...

scholarly journals Visible light-mediated difluoroalkylation of electron-deficient alkenes

2018 ◽  
Vol 14 ◽  
pp. 1637-1641 ◽  
Author(s):  
Vyacheslav I Supranovich ◽  
Vitalij V Levin ◽  
Marina I Struchkova ◽  
Jinbo Hu ◽  
Alexander D Dilman
Keyword(s):  
Double Bond ◽  
Hydrogen Atom ◽  
Visible Light ◽  
Blue Light ◽  
Radical Addition ◽  
Hydrogen Atom Transfer ◽  
Atom Transfer ◽  
Sodium Cyanoborohydride

A method for the reductive difluoroalkylation of electron-deficient alkenes using 1,1-difluorinated iodides mediated by irradiation with blue light is described. The reaction involves radical addition of 1,1-difluorinated radicals at the double bond followed by hydrogen atom transfer from sodium cyanoborohydride.

Visible light photoredox-catalysed remote C–H functionalisation enabled by 1,5-hydrogen atom transfer (1,5-HAT)

2021 ◽  
Author(s):  
Weisi Guo ◽  
Qian Wang ◽  
Jieping Zhu
Keyword(s):  
Hydrogen Atom ◽  
Visible Light ◽  
Hydrogen Atom Transfer ◽  
Atom Transfer

The generation of heteroatom-centred radicals followed by intramolecular 1,5-HAT and functionalisation of the translocated carbon-centred radical is an efficient way to functionalize chemo- and regio-selectively the remote unactivated C(sp3)–H bond.

Ion-molecule reactions in acetone-water mixtures

1966 ◽  
Vol 19 (1) ◽  
pp. 59 ◽  
Author(s):  
Souza BC de ◽  
JH Green
Keyword(s):  
Hydrogen Atom ◽  
Proton Transfer ◽  
Transfer Process ◽  
Hydrogen Atom Transfer ◽  
Mass Spectrometric ◽  
Transfer Mechanism ◽  
Atom Transfer ◽  
Ion Molecule Reactions ◽  
Acetone Water

Mass-spectrometric studies of ion-molecule reactions in acetone-water mixtures at 70 eV and 20 eV electron energies are described. The results provide evidence in favour of the proton transfer mechanism rather than for a hydrogen atom transfer process for the production of M + 1 ions.

scholarly journals Dual Cobalt and Photoredox Catalysis Enabled Intermolecular Oxidative Hydrofunctionalization

2020 ◽  
Author(s):  
Han-Li Sun ◽  
Fan Yang ◽  
Wei-Ting Ye ◽  
Jun-Jie Wang ◽  
Rong Zhu
Keyword(s):  
Hydrogen Atom ◽  
Visible Light ◽  
Electrochemical Analysis ◽  
Hydrogen Atom Transfer ◽  
Redox Process ◽  
Photochemical Oxidation ◽  
Atom Transfer ◽  
Photoredox Catalysis ◽  
Wide Range ◽  
Selective Alkylation

A general protocol has been developed for the Markovnikov-selective intermolecular hydrofunctionalization based on visible-light-mediated Co/Ru dual catalysis. The key feature involves the photochemical oxidation of an organocobalt(III) intermediate derived from hydrogen atom transfer, which is supported by electrochemical analysis, quenching studies and stoichiometric experiments. This unique redox process enables the efficient branch-selective alkylation of pharmaceutically important nucleophiles (phenols, sulfonamides and various N-heterocycles) using a wide range of alkenes including moderately electron-deficient ones. Moreover, light-gated polar functionalization via organocobalt species was demonstrated.

Iminyl Radical-Triggered 1,5-Hydrogen-Atom Transfer/Heck-Type Coupling by Visible-Light Photoredox Catalysis

2019 ◽  
Vol 84 (10) ◽  
pp. 6475-6482 ◽  
Author(s):  
Li Chen ◽  
Li-Na Guo ◽  
Zhi-Yong Ma ◽  
Yu-Rui Gu ◽  
Junjie Zhang ◽  
...  
Keyword(s):  
Hydrogen Atom ◽  
Visible Light ◽  
Hydrogen Atom Transfer ◽  
Atom Transfer ◽  
Photoredox Catalysis ◽  
Type Coupling

Benzylic C–H heteroarylation of N-(benzyloxy)phthalimides with cyanopyridines enabled by photoredox 1,2-hydrogen atom transfer

2020 ◽  
Vol 56 (61) ◽  
pp. 8671-8674
Author(s):  
Long-Jin Zhong ◽  
Hong-Yu Wang ◽  
Xuan-Hui Ouyang ◽  
Jin-Heng Li ◽  
De-Lie An
Keyword(s):  
Hydrogen Atom ◽  
Visible Light ◽  
Hydrogen Atom Transfer ◽  
Atom Transfer

Visible light initiated α-C(sp3)–H hetroarylation of N-(benzyloxy)phthalimides with cyanopyridines via 1,2-hydrogen atom transfer is depicted.

scholarly journals Photo-triggered hydrogen atom transfer from an iridium hydride complex to unactivated olefins

2020 ◽  
Vol 11 (32) ◽  
pp. 8582-8594
Author(s):  
Mirjam R. Schreier ◽  
Björn Pfund ◽  
Xingwei Guo ◽  
Oliver S. Wenger
Keyword(s):  
Hydrogen Atom ◽  
Visible Light ◽  
Electron Donor ◽  
Hydrogen Atom Transfer ◽  
Atom Transfer ◽  
Hydride Complex ◽  
Proton Source

Upon irradiation with visible light, an iridium hydride complex undergoes hydrogen atom transfer (HAT) to unactivated olefins in presence of a sacrificial electron donor and a proton source.

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