Effect of chromium promoter on copper catalysts in ethanol dehydrogenation

1994 ◽  
Vol 59 (2) ◽  
pp. 141-147 ◽  
Author(s):  
Yau-Jen Tu ◽  
Chiuping Li ◽  
Yu-Wen Chen
Keyword(s):  
Copper Catalysts ◽  
Ethanol Dehydrogenation

Copper Catalysts based on carbon–carbon fiburous materials for ethanol dehydrogenation

2016 ◽  
Vol 89 (4) ◽  
pp. 598-602 ◽  
Author(s):  
E. A. Ponomareva ◽  
V. M. Shkinev ◽  
S. V. Zaglyadova ◽  
I. V. Krasnikova ◽  
E. V. Egorova
Keyword(s):  
Copper Catalysts ◽  
Ethanol Dehydrogenation

A study of ethanol dehydrogenation to acetaldehyde over supported copper catalysts: Catalytic activity, deactivation and regeneration

2020 ◽  
Vol 602 ◽  
pp. 117710 ◽  
Author(s):  
Giovanni Pampararo ◽  
Gabriella Garbarino ◽  
Paola Riani ◽  
Maria Villa García ◽  
Vicente Sánchez Escribano ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Copper Catalysts ◽  
Ethanol Dehydrogenation ◽  
Supported Copper Catalysts

Ethanol dehydrogenation over copper catalysts on rice husk ash prepared by ion exchange

2006 ◽  
Vol 304 ◽  
pp. 30-39 ◽  
Author(s):  
Feg-Wen Chang ◽  
Hsien-Chang Yang ◽  
L. Selva Roselin ◽  
Wen-Yao Kuo
Keyword(s):  
Ion Exchange ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Copper Catalysts ◽  
Ethanol Dehydrogenation

Ethanol dehydrogenation on copper catalysts with ytterbium stabilized tetragonal ZrO2 support

2016 ◽  
Vol 90 (12) ◽  
pp. 2370-2376 ◽  
Author(s):  
S. G. Chuklina ◽  
A. I. Pylinina ◽  
L. I. Podzorova ◽  
N. A. Mikhailina ◽  
I. I. Mikhalenko
Keyword(s):  
Copper Catalysts ◽  
Tetragonal Zro2 ◽  
Ethanol Dehydrogenation

Synthetic Routes for 1,4-disubstituted 1,2,3-triazoles: A Review

2019 ◽  
Vol 23 (8) ◽  
pp. 860-900 ◽  
Author(s):  
Chander P. Kaushik ◽  
Jyoti Sangwan ◽  
Raj Luxmi ◽  
Krishan Kumar ◽  
Ashima Pahwa
Keyword(s):  
Solid Phase ◽  
Click Reaction ◽  
Biological Activities ◽  
Triazole Ring ◽  
Copper Catalysts ◽  
Biologically Active ◽  
Pharmaceutical Chemistry ◽  
Biological Targets ◽  
Synthetic Routes ◽  
High Yields

N-Heterocyclic compounds like 1,2,3-triazoles serve as a key scaffolds among organic compounds having diverse applications in the field of drug discovery, bioconjugation, material science, liquid crystals, pharmaceutical chemistry and solid phase organic synthesis. Various drugs containing 1,2,3-triazole ring which are commonly available in market includes Rufinamide, Cefatrizine, Tazobactam etc., Stability to acidic/basic hydrolysis along with significant dipole moment support triazole moiety for appreciable participation in hydrogen bonding and dipole-dipole interactions with biological targets. Huisgen 1,3-dipolar azide-alkyne cycloaddition culminate into a mixture of 1,4 and 1,5- disubstituted 1,2,3-triazoles. In 2001, Sharpless and Meldal came across with a copper(I) catalyzed regioselective synthesis of 1,4-disubstituted 1,2,3-triazoles by cycloaddition between azides and terminal alkynes. This azide-alkyne cycloaddition has been labelled as a one of the important key click reaction. Click synthesis describes chemical reactions that are simple to perform, gives high selectivity, wide in scope, fast reaction rate and high yields. Click reactions are not single specific reaction, but serve as a pathway for construction of simple to complex molecules from a variety of starting materials. In the last few decades, 1,2,3-triazoles attracted attention of researchers all over the world because of their broad spectrum of biological activities. Keeping in view the biological importance of 1,2,3-triazole, in this review we focus on the various synthetic routes for the syntheisis of 1,4-disubstituted 1,2,3-triazoles. This review involves various synthetic protocols which involves copper and non-copper catalysts, different solvents as well as substrates. It will boost synthetic chemists to explore new pathway for the development of newer biologically active 1,2,3-triazoles.

Copper Catalysts in the Synthesis of Five-membered N-polyheterocycles

2018 ◽  
Vol 15 (7) ◽  
pp. 940-971 ◽  
Author(s):  
Navjeet Kaur
Keyword(s):  
Transition Metal ◽  
Organic Synthesis ◽  
Copper Catalysts ◽  
Research Field ◽  
Chemoselective Synthesis ◽  
Specialized Equipment ◽  
Transition Metal Catalyzed ◽  
Synthetic Methodologies ◽  
Metal Catalyzed ◽  
Traditional Approaches

Background: Due to significant biological activity associated with N-, O- and S-heterocycles, a number of reports for their synthesis have appeared in recent decades. Traditional approaches require expensive or highly specialized equipment or would be of limited use to the synthetic organic chemist due to their highly inconvenient approaches. This review summarizes the applications of copper catalysts with the emphasis on their synthetic applications for nitrogen bearing polyheterocylces. In summary, this review article describes the synthesis of a number of five-membered poly heterocyclic rings. Objective: Nowadays new approaches that employ atom-economical and efficient pathway have been developed. The researchers are following natural models to design and synthesize heterocycles. The transition metal catalyzed protocols have attracted the attention as compared to other synthetic methodologies because they use easily available substrates to build multiple substituted complicated molecules directly under mild conditions. In organic synthesis, constituted by transition metal catalyzed coupling transformations are one of the most powerful and useful protocols. The N-heterocycles are synthesized by this convenient and useful tool. Conclusion: The efficient and chemoselective synthesis of heterocycles by this technique has appeared as an important tool. This review shows a highly dynamic research field and the employment of copper catalysts in organic synthesis. Several strategies have been pointed out in the past few years, to meet more sustainable, efficient and environmentally benign chemical products and procedures. The catalytic strategies have been the focus of intense research because they avoid the use of toxic reagents. Among these catalytic strategies, highly rewarding and an important method in heterocycles synthesis is metal catalyzed synthesis.

scholarly journals Highly dispersed, single-site copper catalysts for the electroreduction of CO2 to methane

2020 ◽  
Vol 875 ◽  
pp. 113862 ◽  
Author(s):  
Teng Zhang ◽  
Sumit Verma ◽  
Soojeong Kim ◽  
Tim T. Fister ◽  
Paul J.A. Kenis ◽  
...  
Keyword(s):  
Copper Catalysts ◽  
Single Site ◽  
Highly Dispersed

Accelerated Redox Reaction of Hydrogen Peroxide by Employing Locally Concentrated State of Copper Catalysts on Polymer Chain

2021 ◽  
pp. 2100274
Author(s):  
Shigehito Osawa ◽  
Kenichi Kitanishi ◽  
Maho Kiuchi ◽  
Motoyuki Shimonaka ◽  
Hidenori Otsuka
Keyword(s):  
Hydrogen Peroxide ◽  
Polymer Chain ◽  
Redox Reaction ◽  
Copper Catalysts
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