Search for dissertations about: "Heterocycles"

Showing result 11 - 15 of 46 swedish dissertations containing the word Heterocycles.

  2. 11. Novel Approaches to Phosphorus-containing Heterocycles and Cumulenes

    Author : Anna Arkhypchuk; Sascha Ott; John D. Protasiewicz; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; phosphorus; phosphole; oxaphosphole; cumulene; phospha-Wittig-Horner reagent; molecular electronics; Chemistry; Kemi;

    Abstract : Fast development in all areas of life and science over the last 50 years demands versatile, energy efficient and cheap materials with specific but easily tuneable properties which can be used for example in organic light emitting diodes (OLEDs), thin-film transistors, photovoltaic cells, etc. This thesis is devoted to the development of novel synthetic approaches to molecules with potential applications in the field of molecular electronics. READ MORE

  4. 12. Construction of Five-Membered Heterocycles via Radical Cyclization

    Author : Stefan Berlin; Uppsala universitet; []
    Keywords : ;

    Abstract : .... READ MORE

  5. 13. Mono- and gem-dinitrations en route to heterocycles

    Author : Thomas Brimert; KTH; []
    Keywords : ;

    Abstract : .... READ MORE

  6. 14. Syntheses of some tri- and tetracyclic heterocycles containing an indole moiety

    Author : Robert Engqvist; jan Bergman; Victor Snieckus; Södertörns högskola; Karolinska Institutet; Karolinska Institutet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Alkaloid; drug development; heterocycles; indole; metabolite; synthesis; X-ray crystallography;

    Abstract : This thesis deals with the development of new synthetic methods leading to fused tri- and tetracyclic heterocycles, many of which have interesting biological activity such as antiviral and DNA intercalating properties. The reactions between isatins and 2-aminobenzylamine in acetic acid can give, depending on the conditions, either complex spirooxindoles or indolo[3,2-c]quinolin-6-ones. READ MORE

  7. 15. Synthetic studies of nitrogen containing heterocycles, particularly pyrazole and benzotriazine derivatives

    Author : Azadeh Nakhai; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Pyrazole; indazole; tetrahydroindazoles; hexahydroindazoles; alpha; beta-unsaturated ketones; dihydropyrazolone; 3; 3 -biindolyl; 3; 3 -biindazolyl; o-azidobenzonitriles; benzotriazine; aryl-triazene;

    Abstract : This thesis will mainly focus on the chemistry of nitrogen containing heterocyclic compounds, particularly pyrazole and benzotriazine and related ring systems to these compounds. The first part includes a short introduction to biologically important compounds as well as a description of reactivity and chemistry of benzo[c]pyrazole (indazole) and its derivatives. READ MORE