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  1. 1. Experimental studies of cluster ions containing water, ammonia, pyridine and bisulphate

    Författare :Mauritz Johan Ryding; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; clusters; ions; water; ammonia; pyridine; bisulphate; cross sections; collision induced dissociation CID ; kinetic modelling; electrospray ionization ESI ; time-of-flight TOF ; mass spectrometry;

    Sammanfattning : Molecular cluster ions are fascinating subjects of study. Bridging the size gap between molecules and bulk, they often display non-trivial size dependent behaviour and properties. LÄS MER

  3. 2. Reaction Between Grignard reagents and Heterocyclic N-oxides : Synthesis of Substituted Pyridines, Piperidines and Piperazines

    Författare :Hans Andersson; Fredrik Almqvist; Hans Adolfsson; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Grignard reagents; pyridine N-oxide; pyrazine N-oxide; dienal-oxime; pyridine; ortho- metalation; piperidine; piperazine; asymmetric; Organic synthesis; Organisk syntes; organisk kemi; Organic Chemistry;

    Sammanfattning : This thesis describes the development of new synthetic methodologies for preparation of bioactive interesting compounds, e.g. substituted pyridines, piperidines or piparazines. Thesecompounds are synthesized from commercially available, cheap and easily prepared reagents, videlicet the reaction between Grignard reagents and heterocyclic N-oxides. LÄS MER

  4. 3. Synthesis of β-turn and pyridine based peptidomimetics

    Författare :David Blomberg; Jan Kihlberg; Kay Brickmann; Torbjörn Frejd; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Peptidomimetics; beta-turn; beta-strand; pyridine scaffold; Grignard exchange reaction; SNAr reaction; thrombin inhibitor; Leu-enkephalin.; Organic synthesis; Organisk syntes;

    Sammanfattning : Despite the unfavorable pharmacokinetic properties associated with peptides, they are still of great interest in drug development due to a multitude of interesting biological functions. The development of peptidomimetics strives to maintain or improve the biological activity of a peptide concurrently with removing the unwanted properties. LÄS MER

  5. 4. Bispyridylamides as ligands in asymmetric catalysis

    Författare :Oscar Belda de Lama; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; asymmetric catalysis; chiral ligand; pyridine; amide; allylic alkylation; enantioselective; cyanation; ring-opening; chiral Lewis acid;

    Sammanfattning : This thesis deals with the preparation and use of chiralbispyridylamides as ligands in metal-catalyzed asymmetricreactions. The compounds were prepared by amide formation usingdifferent coupling reagents. LÄS MER

  7. 5. Synthesis and Characterisation of Conjugated Polymers with High Electron Affinity

    Författare :Maria Jonforsen; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; light-emitting diode; solar cell; quinoxaline; conjugated polymer; photodiode; 4-b]pyrazine; pyrido[3; synthesis; photo-oxidation; electron affinity; pyridine;

    Sammanfattning : This thesis describes synthesis and characterisation of conjugated polymers with high electron affinities. Polymers of this type are desired, for example, for use in light-emitting devices or as electron accepting material in photodiodes/solar cells. LÄS MER