Electrochemically Initiated Oxidative Amination of Benzoxazoles Using Tetraalkylammonium Halides As Redox Catalysts

2014 ◽  
Vol 79 (20) ◽  
pp. 9613-9618 ◽  
Author(s):  
Wei-Jing Gao ◽  
Wei-Cui Li ◽  
Cheng-Chu Zeng ◽  
Hong-Yu Tian ◽  
Li-Ming Hu ◽  
...  
Keyword(s):  
Oxidative Amination ◽  
Redox Catalysts ◽  
Tetraalkylammonium Halides

Acceptorless amine dehydrogenation and transamination using Pd-doped layered double hydroxides

2018 ◽  
Author(s):  
Diana Ainembabazi ◽  
Nan An ◽  
Jinesh Manayil ◽  
Kare Wilson ◽  
Adam Lee ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Oxidation States ◽  
Secondary Amines ◽  
Primary Amines ◽  
Acid Dissolution ◽  
Oxidative Amination ◽  
Strong Function ◽  
Excellent Activity ◽  
High Yields ◽  
Double Hydroxides

<div> <p>The synthesis, characterization, and activity of Pd-doped layered double hydroxides (Pd-LDHs) for for acceptorless amine dehydrogenation is reported. These multifunctional catalysts comprise Brønsted basic and Lewis acidic surface sites that stabilize Pd species in 0, 2+, and 4+ oxidation states. Pd speciation and corresponding cataytic performance is a strong function of metal loading. Excellent activity is observed for the oxidative transamination of primary amines and acceptorless dehydrogenation of secondary amines to secondary imines using a low Pd loading (0.5 mol%), without the need for oxidants. N-heterocycles, such as indoline, 1,2,3,4-tetrahydroquinoline, and piperidine, are dehydrogenated to the corresponding aromatics with high yields. The relative yields of secondary imines are proportional to the calculated free energy of reaction, while yields for oxidative amination correlate with the electrophilicity of primary imine intermediates. Reversible amine dehydrogenation and imine hydrogenation determine the relative imine:amine selectivity. Poisoning tests evidence that Pd-LDHs operate heterogeneously, with negligible metal leaching; catalysts can be regenerated by acid dissolution and re-precipitation.</p> </div> <br>

A silicon-based hybrid photocathode modified with an N5-chelated nickel catalyst in a noble-metal-free biomimetic photoelectrochemical cell for solar-driven unbiased overall water splitting

2021 ◽  
Author(s):  
Lunlun Gong ◽  
Peili Zhang ◽  
Guoquan Liu ◽  
Yu Shan ◽  
Mei Wang
Keyword(s):  
Water Splitting ◽  
Nickel Catalyst ◽  
Noble Metal ◽  
Photoelectrochemical Cell ◽  
Metal Free ◽  
Overall Water Splitting ◽  
Redox Catalysts ◽  
Silicon Based ◽  
Modification Of The Surface

Modification of the surface of semiconductor-based photoelectrodes with molecular redox catalysts gives a way to realize atom-efficient catalysis for photoelectrochemical (PEC) H2 and O2 evolution. However, the diversity of immobilized...

scholarly journals Organo-Redox-Catalysis for the difunctionalization of alkenes and oxidative Ritter reactions by C-H functionalization

2021 ◽  
Author(s):  
Martin Klussmann ◽  
Sensheng Liu
Keyword(s):  
Transition Metals ◽  
Redox Reactions ◽  
Organic Substrates ◽  
Redox Catalysis ◽  
Redox Catalysts ◽  
Oxidative Difunctionalization

Transition metals are the dominant catalysts for redox-reactions between peroxides and organic substrates. Here, we show that triarylamines can act as organic redox-catalysts, enabling oxidative difunctionalization reactions of alkenes and...

The First Rhodium-Catalyzed Anti-Markovnikov Hydroamination: Studies on Hydroamination and Oxidative Amination of Aromatic Olefins

1999 ◽  
Vol 5 (4) ◽  
pp. 1306-1319 ◽  
Author(s):  
M. Beller ◽  
H. Trauthwein ◽  
M. Eichberger ◽  
C. Breindl ◽  
J. Herwig ◽  
...  
Keyword(s):  
Oxidative Amination

Aerobic oxidation of thiols to disulfides using iron metal–organic frameworks as solid redox catalysts

2010 ◽  
Vol 46 (35) ◽  
pp. 6476 ◽  
Author(s):  
Amarajothi Dhakshinamoorthy ◽  
Mercedes Alvaro ◽  
Hermenegildo Garcia
Keyword(s):  
Aerobic Oxidation ◽  
Metal Organic Frameworks ◽  
Iron Metal ◽  
Redox Catalysts ◽  
Metal Organic

Direct and metal-free oxidative amination of sp3 C–H bonds for the construction of 2-hetarylquinazolin-4(3H)-ones

2016 ◽  
Vol 3 (9) ◽  
pp. 1096-1099 ◽  
Author(s):  
Huanhuan Liu ◽  
Tianran Zhai ◽  
Shiteng Ding ◽  
Yalei Hou ◽  
Xiangyu Zhang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Functional Group ◽  
New Method ◽  
Oxidative Amination ◽  
Metal Free ◽  
Mild Conditions

New method for synthesis of 2-hetarylquinazolin-4(3H)-ones from 2-aminobenzamides and (2-azaaryl)methanes under transition-metal free conditions, featuring a wide substrate scope with a broad range of functional group tolerance under mild conditions.

Cyclic Cleavage of Water into H2and O2by Visible Light with Coupled Redox Catalysts

1979 ◽  
Vol 18 (9) ◽  
pp. 701-702 ◽  
Author(s):  
Kuppuswamy Kalyanasundaram ◽  
Michael Grätzel
Keyword(s):  
Visible Light ◽  
Redox Catalysts

Novel peroxosolvates of tetraalkylammonium halides: the first case of layers containing hydrogen-bonded peroxide molecules

CrystEngComm ◽  
2021 ◽  
Author(s):  
Mger A. Navasardyan ◽  
Stanislav Bezzubov ◽  
Alexander G. Medvedev ◽  
Petr V Prikhodchenko ◽  
Churakov Andrei
Keyword(s):  
Hydrogen Peroxide ◽  
X Ray ◽  
X Ray Crystallography ◽  
First Case ◽  
Tetraalkylammonium Halides ◽  
Hydrogen Bonded

Novel peroxosolvates of tetraalkylammonium halides Et4N+Cl–•2(H2O2) (1), Et4N+Br–•2(H2O2) (2), Me3(ClCH2CH2)N+Cl–•H2O2 (3) and Me3PhN+Cl–•H2O2 (4) were prepared from concentrated hydrogen peroxide and the corresponding structures were determined by X-ray crystallography. Structures...

Silver/ion exchanger nanocomposites as low-temperature redox-catalysts for methanal oxidation

2015 ◽  
Vol 179 ◽  
pp. 364-371 ◽  
Author(s):  
Ekaterina A. Sakardina ◽  
Tamara A. Kravchenko ◽  
Ekaterina V. Zolotukhina ◽  
Mikhail A. Vorotyntsev
Keyword(s):  
Low Temperature ◽  
Silver Ion ◽  
Ion Exchanger ◽  
Redox Catalysts
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