Aerobic Oxidative Coupling of Aniline Catalyzed by One-Dimensional Manganese Hydroxide Nanomaterials

Synlett ◽  
2019 ◽  
Vol 30 (05) ◽  
pp. 552-556
Author(s):  
Hui Miao ◽  
Kelong Ma ◽  
Shiwei Hu ◽  
Ruiqian Li ◽  
Lin Sun ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxidative Coupling ◽  
Heterogeneous Catalysts ◽  
Azo Compounds ◽  
Organic Chemical ◽  
Ambient Conditions ◽  
One Dimensional ◽  
Aromatic Azo Compounds ◽  
Activation Of Oxygen ◽  
Organic Chemical Industry

The aerobic oxidative coupling of aniline is an effective process for producing aromatic azo compounds, which are widely used in the organic chemical industry. The development of heterogeneous catalysts for this reaction would be advantageous because of their recyclability and convenience in posttreatment. In this work, one-dimensional Mn(OH)2 nanostructure with various shapes were synthesized through the adjustment of various surfactants. The as-synthesized Mn(OH)2 nanobelts and nanowires showed superior catalytic activity in the activation of oxygen and aniline. Aromatic azo compounds with a variety of substituents were produced through the coupling of the corresponding anilines without additives under ambient conditions.

scholarly journals Mesoporous Manganese Oxide Catalyzed Aerobic Oxidative Coupling of Anilines To Aromatic Azo Compounds

2016 ◽  
Vol 128 (6) ◽  
pp. 2211-2215 ◽  
Author(s):  
Biswanath Dutta ◽  
Sourav Biswas ◽  
Vinit Sharma ◽  
Nancy Ortins Savage ◽  
S. Pamir Alpay ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
Oxidative Coupling ◽  
Azo Compounds ◽  
Aromatic Azo Compounds

ChemInform Abstract: Mesoporous Manganese Oxide Catalyzed Aerobic Oxidative Coupling of Anilines to Aromatic Azo Compounds.

ChemInform ◽  
2016 ◽  
Vol 47 (23) ◽  
Author(s):  
Biswanath Dutta ◽  
Sourav Biswas ◽  
Vinit Sharma ◽  
Nancy Ortins Savage ◽  
S. Pamir Alpay ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
Oxidative Coupling ◽  
Azo Compounds ◽  
Aromatic Azo Compounds

scholarly journals A metal-catalyst-free oxidative coupling of anilines to aromatic azo compounds in water using bleach

2019 ◽  
Author(s):  
Theodora Von Zuben ◽  
◽  
Airton Salles Junior ◽  
Gabriela de Souza ◽  
◽  
...  
Keyword(s):  
Oxidative Coupling ◽  
Azo Compounds ◽  
Metal Catalyst ◽  
Catalyst Free ◽  
Aromatic Azo Compounds

scholarly journals Mesoporous Manganese Oxide Catalyzed Aerobic Oxidative Coupling of Anilines To Aromatic Azo Compounds

2016 ◽  
Vol 55 (6) ◽  
pp. 2171-2175 ◽  
Author(s):  
Biswanath Dutta ◽  
Sourav Biswas ◽  
Vinit Sharma ◽  
Nancy Ortins Savage ◽  
S. Pamir Alpay ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
Oxidative Coupling ◽  
Azo Compounds ◽  
Aromatic Azo Compounds

scholarly journals Double role of metalloporphyrins in catalytic bioinspired supramolecular metal–organic frameworks (SMOFs)

IUCrJ ◽  
2018 ◽  
Vol 5 (5) ◽  
pp. 559-568
Author(s):  
Arkaitz Fidalgo-Marijuan ◽  
Eder Amayuelas ◽  
Gotzone Barandika ◽  
Edurne S. Larrea ◽  
Begoña Bazán ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalysts ◽  
Metal Organic Frameworks ◽  
Cascade Reactions ◽  
Structural Features ◽  
Microwave Assisted Synthesis ◽  
Great Effort ◽  
Ambient Conditions ◽  
One Pot ◽  
Metal Organic

Heterogeneous catalysts are of great interest in many industrial processes for environmental reasons and, during recent years, a great effort has been devoted to obtain metal–organic frameworks (MOFs) with improved catalytic behaviour. Few supramolecular metal–organic frameworks (SMOFs) are stable under ambient conditions and those with anchored catalysts exhibit favourable properties. However, this paper presents an innovative approach that consists of using metal nodes as both structural synthons and catalysts. Regarding the latter, metalloporphyrins are suitable candidates to play both roles simultaneously. In fact, there are a number of papers that report coordination compounds based on metalloporphyrins exhibiting these features. Thus, the aim of this bioinspired work was to obtain stable SMOFs (at room temperature) based on metalloporphyrins and explore their catalytic activity. This work reports the environmentally friendly microwave-assisted synthesis and characterization of the compound [H(bipy)]2[(MnTPPS)(H2O)2]·2bipy·14H2O (TPPS = meso-tetraphenylporphine-4,4′,4′′,4′′′-tetrasulfonic acid and bipy = 4,4′-bipyridine). This compound is the first example of an MnTPPS-based SMOF, as far as we are aware, and has been structurally and thermally characterized through single-crystal X-ray diffraction, IR spectroscopy, thermogravimetry and transmission electron microscopy. Additionally, this work explores not only the catalytic activity of this compound but also of the compounds μ-O-[FeTCPP]2·16DMF and [CoTPPS0.5(bipy)(H2O)2]·6H2O. The structural features of these supramolecular materials, with accessible networks and high thermal stability, are responsible for their excellent behaviour as heterogeneous catalysts for different oxidation, condensation (aldol and Knoevenagel) and one-pot cascade reactions.

A metal-catalyst-free oxidative coupling of anilines to aromatic azo compounds in water using bleach

2018 ◽  
Vol 59 (42) ◽  
pp. 3753-3755 ◽  
Author(s):  
Gabriela F.P. de Souza ◽  
Theodora W. von Zuben ◽  
Airton G. Salles
Keyword(s):  
Oxidative Coupling ◽  
Azo Compounds ◽  
Metal Catalyst ◽  
Catalyst Free ◽  
Aromatic Azo Compounds

Single crystalline MnOOH nanotubes for selectively oxidative coupling of anilines to aromatic azo compounds

2021 ◽  
Author(s):  
Yong Zou ◽  
Mingkai Zhang ◽  
Fangxian Cao ◽  
jiayuan Li ◽  
Sai Zhang ◽  
...  
Keyword(s):  
Oxidative Coupling ◽  
Catalytic Synthesis ◽  
Azo Compounds ◽  
Single Crystalline ◽  
Azoxy Compounds ◽  
The Poor ◽  
Aromatic Azo Compounds ◽  
Economical Process

Catalytic synthesis of aromatic azoxy compounds from oxidative coupling of aniline by molecule oxygen represents a facile, green and valuable process; however, such an economical process suffers from the poor...

Ordered Intermetallic Nanoparticles with High Catalytic Activity Prepared by an Electrochemically Induced Phase Transformation

2019 ◽  
Author(s):  
Du Sun ◽  
yunfei wang ◽  
Kenneth Livi ◽  
chuhong wang ◽  
ruichun luo ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Diffusion Mechanism ◽  
Reduction Reaction ◽  
Atomic Scale ◽  
High Catalytic Activity ◽  
Ambient Conditions ◽  
Magnetic Devices ◽  
Disordered Alloys ◽  
Ordered Intermetallic ◽  
Intermetallic Nanoparticles

<div> <p>The synthesis of alloys with long range atomic scale ordering (ordered intermetallics) is an emerging field of nanochemistry. Ordered intermetallic nanoparticles are useful for a wide variety of applications such as catalysis, superconductors, and magnetic devices. However, the preparation of nanostructured ordered intermetallics is challenging in comparison to disordered alloys, hindering progress in materials development. We report a process for converting colloidally synthesized ordered intermetallic PdBi<sub>2</sub> to ordered intermetallic Pd<sub>3</sub>Bi nanoparticles under ambient conditions by an electrochemically induced phase transition. The low melting point of PdBi<sub>2</sub> corresponds to low vacancy formation energies which enables the facile removal of the Bi from the surface, while simultaneously enabling interdiffusion of the constituent atoms via a vacancy diffusion mechanism under ambient conditions. The resulting phase-converted ordered intermetallic Pd<sub>3</sub>Bi exhibits 11x and 3.5x higher mass activty and high methanol tolerance for the oxygen reduction reaction compared to Pt/C and Pd/C, respectively,which is the highest reported for a Pd-based catalyst, to the best of our knowledge. These results establish a key development in the synthesis of noble metal rich ordered intermetallic phases with high catalytic activity, and sets forth guidelines for the design of ordered intermetallic compounds under ambient conditions.</p> </div>

Bifunctional Au/Co3O4‐Cs (Basic and Redox)‐ Catalyzed Oxidative Synthesis of Aromatic Azo Compounds from Anilines

2021 ◽  
Author(s):  
Charles O. Oseghale ◽  
Dele Peter Fapojuwo ◽  
Oyekunle Azeez Alimi ◽  
Christianah Aarinola Akinnawo ◽  
Batsile M. Mogudi ◽  
...  
Keyword(s):  
Azo Compounds ◽  
Aromatic Azo Compounds

Lewis Acid-Promoted Suzuki Reaction using Palladium Chloride Anchored on a Polymer as a Catalyst

2008 ◽  
Vol 61 (8) ◽  
pp. 610 ◽  
Author(s):  
Guozhi Fan ◽  
Hanjun Zhang ◽  
Siqing Cheng ◽  
Zhandong Ren ◽  
Zhijun Hu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Lewis Acid ◽  
Lewis Acids ◽  
Heterogeneous Catalysts ◽  
Suzuki Reaction ◽  
Cross Coupling ◽  
Palladium Chloride ◽  
Coupling Reactions ◽  
Cross Coupling Reactions ◽  
Recoverable Catalyst

Palladium chloride anchored on polystyrene modified by 5-amino-1,10-phenanthroline was prepared and used as an efficient recoverable catalyst for Suzuki cross-coupling reactions. The heterogeneous catalysts can be easily separated from the reaction mixture and reused for five cycles without significant Pd leaching and loss of catalytic activity. Rate enhancement in the Suzuki reaction by Lewis acids was also studied.

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