Sökning: "thermolysis"

Visar resultat 6 - 10 av 14 avhandlingar innehållade ordet thermolysis.

  1. 6. Stereoselective Nucleophilic Additions to Aldehydes and Synthesis of α-Amino-β- Hydroxy-Esters

    Författare :Jakob Danielsson; Peter Somfai; Hans Adolfsson; Tobias Rein; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Asymmetric induction; stereochemical models; Mukaiyama; polar Felkin-Anh; Cornforth-Evans; 1; 3-dipole; aziridine; cycloaddition; amino alcohol; carbonylation; Heck reaction; quaternary stereocenter;

    Sammanfattning : This thesis deals with the development of new reaction methodology as well as stereochemical investigations. The first part concerns the investigation of 1,2- and merged 1,2- and 1,3- asymmetric induction in Mukaiyama aldol additions to α-heteroatom and α,β- heteroatom substituted aldehydes respectively. LÄS MER

  3. 7. Cold trapping and reinjection techniques for gas chromatography-mass spectrometry

    Författare :Sven P. Jacobsson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis describes the use of cold trapping and reinjection techniques in combination with gas chromatography-mass spectrometry. A summary of different cold trap/ reinjection systems is presented. LÄS MER

  4. 8. Natural Product Synthesis and Development of Novel Reaction Methodology

    Författare :Jakob Danielsson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; perophoramidine; communesin; quaternary stereocenter; Diels-Alder; 1; 2-asymmetric induction; polar Felkin-Anh; Cornforth-Evans; Mukaiyama aldol; 3-dipolar cycloaddition; azomethine ylide; 2-amino alcohol; anti-α-amino-β-hydroxy ester;

    Sammanfattning : This thesis deals with the development of new reaction methodology for stereoselective synthesis, as well as total synthesis of natural products and investigations of the stereochemical outcome in the Mukaiyama aldol reaction. Chapter 2 describes efforts made towards the total synthesis of the oxindole natural products perophoramidine and the communesin. LÄS MER

  5. 9. Design, Synthesis and Characterization of Nanostructured Thermoelectric Materials

    Författare :Bejan Hamawandi; Muhammet Toprak; MARISOL Martin Gonzalez; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Materials chemistry; Material and Nano Physics; Material- och nanofysik; Fysik; Physics;

    Sammanfattning : The demand for energy is rapidly increasing, triggering more carbon emission and global warming. Alternative green energy sources are essential to secure the future generation from the effect of pollution and global warming. LÄS MER

  7. 10. Development of Lewis acid mediated stereoselective synthesis of nitrogen containing heterocycles

    Författare :Åsa Sjöholm Timén; KTH; []
    Nyckelord :organic chemistry;

    Sammanfattning : This thesis deals with the development of syntheticmethodologies for the preparation of enantio- anddiastereomerically enriched nitrogen-containingheterocycles.Asymmetric Lewis acid mediated Diels-Alder reactions with2H-azirines as dienophiles have been studied. LÄS MER