asymmetric synthesis

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asymmetric synthesis

[¦ā·sə¦me·trik ′sin·thə·səs]
(organic chemistry)
Chemical synthesis of a pure enantiomer, or of an enantiomorphic mixture in which one enantiomer predominates, without the use of resolution.
References in periodicals archive ?
This is why the asymmetric reaction function is then parallel to the one that would prevail without indexation, as is output.
But in a continuation of China's asymmetric reaction to the embassy bombing, another article lambasted U.
It could be used to make many kinds of drugs or compounds -- and almost any molecule that involves an asymmetric reaction.
The sources of the asymmetric reactions remain a puzzle, which may warrant additional research.
He has been prominent in the discovery and development of enzyme catalysts for asymmetric reactions.
Among their topics are recyclable organocatalysts in asymmetric reactions, the synthesis of chiral catalysts supported on organic polymers, asymmetric catalytic synthesis in supercritical fluids, microwave-assisted transition metal-catalyzed asymmetric synthesis, silicate-mediated stereoselective reactions catalyzed by chiral Lewis bases, and stereoselective nitrogen heterocycle synthesis mediated by chiral metal catalysts.
In this work, they present 13 review articles describing various aspects of this emerging field, including asymmetric synthesis of chiral sulfoxides, asymmetric synthesis of optically active sulfinic acid esters, asymmetric transformations mediated by sulfinyl groups, synthesis and applications of chiral dithiocetal derivatives, synthesis and use of chiral sulfur ylides, synthesis and use of chiral sulfoximines, synthesis and use of chiral sulfinamides, asymmetric catalysis using sulfoxides as ligands, sulfones in asymmetric catalysis, and computational studies on asymmetric reactions with sulfur reagents.
The initial chapters present the foundations of asymmetric synthesis, including the theory and applications of individual asymmetric reactions.
In this 83rd volume of the publication, 28 preparations are presented that reflect recent topical research themes in the field of organic chemistry, including the synthesis of ligands for asymmetric reactions, catalytic reactions of alcohols and amines, topical oxidations, boron-mediated allylations, functional group transformations, ubiquitous cross-coupling reactions, practical ring-forming reactions, and positioning of organofluorine molecules.
With the new SGI solutions, UTAS scientists can accelerate their efforts to solve two extraordinarily difficult problems in chemistry: designing transition metal catalysts to turn nitrogen and carbon monoxide into other useful chemical compounds; and designing specific chemicals to carry out organocatalysis (chemical reaction accelerants made up of organic building blocks) of asymmetric reactions.
They have arranged the papers into five sections dealing with the creation of new stereocenters using existing stereochemical information in the molecule or from a chiral auxiliary, metal-catalyzed asymmetric synthesis, asymmetric catalysis with enzymes and small organic molecules, asymmetric reactions in total synthesis, and asymmetric synthesis for the production of drugs and fine chemicals.
An advantage of these new chiral ligands is that they are generally more effective ligands for transition metal-catalyzed asymmetric reactions than ligand systems with hydrogen at the ortho position.

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