Sökning: "stereochemistry"
Visar resultat 11 - 15 av 44 avhandlingar innehållade ordet stereochemistry.
11. Design and Synthesis of Serine and Aspartic Protease Inhibitors
Sammanfattning : This thesis describes the design and synthesis of compounds that areintended to inhibit serine and aspartic proteases. The first part of the text deals with preparation of inhibitors of the hepatitis C virus (HCV) NS3 serine protease. Hepatitis C is predominantly a chronic disease that afflicts about 170 million people worldwide. LÄS MER
12. Structure-Based Design and Synthesis of Protease Inhibitors Using Cycloalkenes as Proline Bioisosteres and Combinatorial Syntheses of a Targeted Library
Sammanfattning : Structure-based drug design and combinatorial chemistry play important roles in the search for new drugs, and both these elements of medicinal chemistry were included in the present studies. This thesis outlines the synthesis of protease inhibitors against thrombin and the HCV NS3 protease, as well as the synthesis of a combinatorial library using solid phase chemistry. LÄS MER
13. Purification, Stereoisomeric Analysis and Quantification of Biologically Active Compounds in Extracts from Pine Sawflies, African Butterflies and Orchid Bees
Sammanfattning : Stereochemistry plays an important role in nature because biologically important molecules such as amino acids, nucleotides and sugars, only exist in enantiomerically pure forms. Semiochemicals carry messages, between the same species (pheromones) and between different species (allelochemicals). LÄS MER
14. Enzymes as catalysts in synthesis of enantiomerically pure building blocks : secondary alcohols bearing two vicinal stereocenters
Sammanfattning : Enzymes as tools in organic synthesis have provided enormous advantages. This thesis deals with the applications of enzymes in the kinetic resolutions of racemic compounds. The stereochemistry of chiral compounds and the kinetics of α/β hydrolase lipases are presented. LÄS MER
15. Stereoselective synthesis of semiochemicals related to pine sawflies
Sammanfattning : This thesis describes the stereochemistry and charactericsof ()-1,6-germacradien-5-ol, isolated from the larvaldefence substance of the pine sawflyNeodiprion sertiferand from the needles of Scots pine,Pinus sylvestris. The conformational behaviour of thissesquiterpene alcohol was investigated by molecular mechanicsstudies (MM2) and NMR. LÄS MER
