Sökning: "enantiomeric ratio"
Visar resultat 1 - 5 av 9 avhandlingar innehållade orden enantiomeric ratio.
1. Chiral building blocks for synthesis of pine sawfly sex pheromones Enantioselective Lipase Catalysed Acylations and Esterifications of Primary Alcohols and Acids and Synthesis of the Sex Pheromone of the Pine Sawfly Microdiprion pallipes
Sammanfattning : This thesis describes the development of new methods for thepreparation of enantiomerically pure methyl branched alkylcompounds and their use as building blocks in the synthesis ofstereoisomerically pure pheromones of pine sawflies.The high regioselectivity, enantioselectivity and activityof lipases in organic solvent in conjunction withenvironmentally compatible reaction conditions have madelipase-catalysed synthesis an attractive alternative toconventional synthetic methods in organic chemistry. LÄS MER
2. Enthalpy and Entropy in Enzyme Catalysis : A Study of Lipase Enantioselectivity
Sammanfattning : Biocatalysis has become a popular technique in organic synthesis due to high activity and selectivity of enzyme catalyzed reactions. Enantioselectivity is a particularly attractive enzyme property, which is utilized for the production of enantiopure substances. LÄS MER
3. Genetic influence on enantiomeric drug disposition : Focus on venlafaxine and citalopram
Sammanfattning : A molecule that is not identical to its mirror image is said to be chiral. A racemic mixture, or a racemate, is one that has equal amounts of S- and R-enantiomers of a chiral molecule. Two examples of frequently prescribed racemic drugs are the antidepressants venlafaxine (VEN) and citalopram (CIT). LÄS MER
4. Enantiospecific Analysis and Environmental Behavior of Chiral Persistent Organic Pollutants (POPs)
Sammanfattning : Many persistent organic pollutants (POPs) are chiral. These pollutants are generally released into the environment as racemates, but frequently undergo alterations in enantiomeric composition as soon as they are subjected to life chemistry processes. LÄS MER
5. Asymmetric transfer hydrogenation of aromatic ketones and azirines with NH-ligands
Sammanfattning : The Ru(arene)[(1S, 3R, 4R)-3-(Hydroxymethyl)-2-azabicyclo[2.2.1]heptane catalyst was optimized as ligand in the asymmetric transfer hydrogenation of ketones and resulted in increased activity and enantioselectivity of the catalyst. LÄS MER