scholarly journals Correlation between the Selectivity and the Structure of an Asymmetric Catalyst Built on a Chirally Amplified Supramolecular Helical Scaffold

2016 ◽  
Vol 138 (14) ◽  
pp. 4908-4916 ◽  
Author(s):  
Alaric Desmarchelier ◽  
Xavier Caumes ◽  
Matthieu Raynal ◽  
Anton Vidal-Ferran ◽  
Piet W. N. M. van Leeuwen ◽  
...  
Keyword(s):  
Asymmetric Catalyst

scholarly journals Asymmetric Hydrogenation of C=N Double Bond with Modified Raney Nickel 1. New Determination Method for the Reaction Mechanism Using Asymmetric Catalyst

1970 ◽  
Vol 43 (6) ◽  
pp. 1792-1795 ◽  
Author(s):  
Yoshiharu Izumi ◽  
Hidemitsu Takizawa ◽  
Kunio Nakagawa ◽  
Ryushichi Imamura ◽  
Masami Imaida ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Double Bond ◽  
Raney Nickel ◽  
Asymmetric Hydrogenation ◽  
Determination Method ◽  
Asymmetric Catalyst

An Asymmetric Catalyst

Nature ◽  
1956 ◽  
Vol 178 (4528) ◽  
pp. 323-324 ◽  
Author(s):  
S. AKABORI ◽  
S. SAKURAI ◽  
Y. IZUMI ◽  
Y. FUJII
Keyword(s):  
Asymmetric Catalyst

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.

A Redox-Reconfigurable, Ambidextrous Asymmetric Catalyst

2012 ◽  
Vol 134 (19) ◽  
pp. 8054-8057 ◽  
Author(s):  
Shahab Mortezaei ◽  
Noelle R. Catarineu ◽  
James W. Canary
Keyword(s):  
Asymmetric Catalyst

A dendrimer-supported heterobimetallic asymmetric catalyst

2002 ◽  
Vol 13 (19) ◽  
pp. 2083-2087 ◽  
Author(s):  
Takayoshi Arai ◽  
Tetuya Sekiguti ◽  
Yoshimasa Iizuka ◽  
Shinobu Takizawa ◽  
Shigeru Sakamoto ◽  
...  
Keyword(s):  
Asymmetric Catalyst

From Supramolecular Chirogenic Systems towards Prospective Functional Materials

2013 ◽  
Vol 699 ◽  
pp. 87-91 ◽  
Author(s):  
Victor Borovkov
Keyword(s):  
Thin Films ◽  
Solid State ◽  
Supramolecular Chemistry ◽  
Functional Materials ◽  
Practical Application ◽  
Research Groups ◽  
Supramolecular Chirality ◽  
Potential Applications ◽  
Chiral Modification ◽  
Asymmetric Catalyst

This paper presents a succinct overview of recent advances of our research groups in the field of supramolecular chirogenic systems in the solution and in the solid state and consequent progress towards various functional materials having potential applications in different areas of science and technology. The phenomenon of supramolecular chirality, which is a smart combination of supramolecular chemistry and chiral science, is demonstrated with one of the most representative structural motifs amongst existing chirogenic systems, which is based upon the ethane-bridged bis-porphyrinoids. Further progress towards various functional materials is made upon preparation of different thin-films and nanostructures using the same bis-porphyrin architecture. For more practical application of functional materials chiral modification of metal surface is carried out resulting in effective asymmetric catalyst.

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