scholarly journals Pd(0) encapsulated nanocatalysts as superior catalytic systems for Pd-catalyzed organic transformations

RSC Advances ◽  
2016 ◽  
Vol 6 (91) ◽  
pp. 88588-88624 ◽  
Author(s):  
S. Sadjadi ◽  
M. M. Heravi
Keyword(s):  
Chemical Reactions ◽  
Organic Transformations ◽  
Catalytic Systems

In the last decade, Pd(0) nanoparticles have attracted increasing attention due to their outstanding utility as nanocatalysts in a wide variety of key chemical reactions.

scholarly journals Can we measure catalyst efficiency in asymmetric chemical reactions? A theoretical approach

2009 ◽  
Vol 5 ◽  
Author(s):  
Shaimaa El-Fayyoumy ◽  
Matthew H Todd ◽  
Christopher J Richards
Keyword(s):  
Chemical Reactions ◽  
Small Molecule ◽  
Enantiomeric Excess ◽  
Catalytic Efficiency ◽  
Catalytic Systems ◽  
Asymmetric Catalysts ◽  
Asymmetric Catalytic ◽  
Short Period ◽  
Asymmetric Catalyst ◽  
Catalyst Efficiency

Small molecule asymmetric catalysts are often described as being “good” or “bad” but to date there has been no way of comparing catalyst efficiency quantitatively. We define a simple formula, Asymmetric Catalyst Efficiency (ACE), that allows for such a comparison. We propose that a catalyst is more efficient if fewer atoms are utilised to give a product in a required enantiomeric excess. We illustrate this concept by analysing several well-known asymmetric catalytic chemical reactions carried out in academic laboratories, and compare small molecule catalysts with enzymes. We conclude that ACE is a useful descriptor for the comparison of diverse catalytic systems. It is also noteworthy that, despite the relatively short period of investigation into small molecule catalysts, they are competitive with enzymes with regards to this measure of catalytic efficiency.

Novel Palladium Catalytic Systems for Organic Transformations

ChemInform ◽  
2004 ◽  
Vol 35 (20) ◽  
Author(s):  
Takahiro Nishimura ◽  
Sakae Uemura
Keyword(s):  
Organic Transformations ◽  
Catalytic Systems

Design and Preparation of Heterogeneous Catalysts by Controlled Chemical Reactions with Oxygen and Hydrogen

1994 ◽  
Vol 368 ◽  
Author(s):  
David L. Cocke ◽  
Donald G. Naugle ◽  
Thomas R. Hess
Keyword(s):  
Chemical Reactions ◽  
Heterogeneous Catalysts ◽  
Formation Processes ◽  
Catalytic Systems ◽  
Heterogeneous Catalytic ◽  
Reduction Processes ◽  
Alloy Oxidation ◽  
Reaction Models ◽  
Catalyst Systems ◽  
Insight Into

ABSTRACTChemical reactions of metals and strongly interacting alloys such as Cu-Mn, Ni-Ti, Ni-Hf and Ni-Zr with oxygen and hydrogen play important roles in the preparation, activation, and regeneration of many important heterogeneous catalytic systems involving supported and unsupported metals and alloys. Recent advances in the understanding of metal and alloy oxidation is bringing new insight into the reactive design and activation of bi- and multi-metallic catalysts. By surface studies of oxidation, thermal annealing and reduction of selected alloys and their thin films and reaction layers and products we have been able to delineate the factors which are most important to the oxide formation processes and the oxide reduction processes. Reaction models developed from these results are permitting the design of new catalyst systems and providing long sought understanding to explain specific aspects of well established metallic catalysts.

Ultrasound-Promoted Organic Synthesis – A Recent Update

2021 ◽  
Vol 25 ◽  
Author(s):  
Goutam Brahmachari ◽  
Nayana Nayek ◽  
Mullicka Mandal ◽  
Anindita Bhowmick ◽  
Indrajit Karmakar
Keyword(s):  
Organic Chemistry ◽  
Green Chemistry ◽  
Organic Synthesis ◽  
Ultrasound Irradiation ◽  
Present Review ◽  
Organic Transformations ◽  
Reaction Conditions ◽  
Catalytic Systems ◽  
Bond Forming ◽  
Reducing Energy

: Ultrasonication, nowadays, is well-regarded as an effective green tool in implementing a plethora of organic transformations. The last decade has seen quite useful applications of ultrasound irradiation in synthetic organic chemistry. Ultrasound has already come out as a unique technique in green chemistry practice, for its inherent properties of minimizing wastes and reducing energy and time, thereby increasing the product yields with higher purities under milder reaction conditions. The present review summarizes ultrasound-promoted useful organic transformations involving both carbon-carbon and carbon-heteroatom (N, O, S) bond-forming reactions in the absence or presence of varying catalytic systems, reported during the period 2016-2020.

Novel Palladium Catalytic Systems for Organic Transformations

Synlett ◽  
2004 ◽  
pp. 0201-0216 ◽  
Author(s):  
Sakae Uemura ◽  
Takahiro Nishimura
Keyword(s):  
Organic Transformations ◽  
Catalytic Systems

Ionic Liquid Catalytic Systems and Chemical Reactions

2009 ◽  
Vol 13 (13) ◽  
pp. 1278-1299 ◽  
Author(s):  
Tao Jiang ◽  
Buxing Han
Keyword(s):  
Ionic Liquid ◽  
Chemical Reactions ◽  
Catalytic Systems

scholarly journals Applications of Cu(0) encapsulated nanocatalysts as superior catalytic systems in Cu-catalyzed organic transformations

RSC Advances ◽  
2020 ◽  
Vol 10 (42) ◽  
pp. 24893-24940 ◽  
Author(s):  
Majid M. Heravi ◽  
Bahareh Heidari ◽  
Vahideh Zadsirjan ◽  
Leila Mohammadi
Keyword(s):  
Catalytic Activity ◽  
Porous Materials ◽  
Metal Ion ◽  
Organic Transformations ◽  
Catalytic Systems

In this review, the catalytic activity of encapsulated Cu-NPs in different important organic transformations is compared with those of a variety of organic, inorganic and hybrid porous materials bearing a traded metal ion.

scholarly journals Navigating through the Maze of Homogeneous Catalyst Design with Machine Learning

2020 ◽  
Author(s):  
Gabriel dos Passos Gomes ◽  
Robert Pollice ◽  
Alan Aspuru-Guzik
Keyword(s):  
Machine Learning ◽  
Chemical Reactions ◽  
Catalyst Design ◽  
New Drugs ◽  
Homogeneous Catalyst ◽  
Chemical Bonds ◽  
Catalytic Systems ◽  
Data Intensive ◽  
The Past

<div><div><div><p>The ability to forge difficult chemical bonds through catalysis has transformed society on all fronts, from feeding our ever-growing populations to increasing our life-expectancies through the synthesis of new drugs. However, developing new chemical reactions and catalytic systems is a tedious task that requires tremendous discovery and optimization efforts. Over the past decade, advances in machine learning have revolutionized a whole new way to approach data- intensive problems, and many of these developments have started to enter chemistry. However, similar progress in the field of homogenous catalysis are only in their infancy. In this article, we want to outline our vision for the future of catalyst design and the role of machine learning to navigate this maze.</p></div></div></div>

scholarly journals Navigating through the Maze of Homogeneous Catalyst Design with Machine Learning

2020 ◽  
Author(s):  
Gabriel dos Passos Gomes ◽  
Robert Pollice ◽  
Alan Aspuru-Guzik
Keyword(s):  
Machine Learning ◽  
Chemical Reactions ◽  
Catalyst Design ◽  
New Drugs ◽  
Homogeneous Catalyst ◽  
Chemical Bonds ◽  
Catalytic Systems ◽  
Data Intensive ◽  
The Past

<div><div><div><p>The ability to forge difficult chemical bonds through catalysis has transformed society on all fronts, from feeding our ever-growing populations to increasing our life-expectancies through the synthesis of new drugs. However, developing new chemical reactions and catalytic systems is a tedious task that requires tremendous discovery and optimization efforts. Over the past decade, advances in machine learning have revolutionized a whole new way to approach data- intensive problems, and many of these developments have started to enter chemistry. However, similar progress in the field of homogenous catalysis are only in their infancy. In this article, we want to outline our vision for the future of catalyst design and the role of machine learning to navigate this maze.</p></div></div></div>

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