Search for dissertations about: "heterocyclic chemistry"

Showing result 31 - 35 of 41 swedish dissertations containing the words heterocyclic chemistry.

  1. 31. Synthesis of heterocycles from anthranilic acid and its derivatives

    University dissertation from Stockholm : Karolinska Instiutet

    Author : Per Wiklund; Karolinska Institutet.; Karolinska Institutet.; Södertörns högskola.; [2004]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Anthranilic acid; synthesis; heterocycles; benzodiazepines; HNO nitrosyl ;

    Abstract : Anthranilic acid (2-aminobenzoic acid, Aa) is the biochemical precursor to the amino acid tryptophan, as well as a catabolic product of tryptophan in animals. It is also integrated into many alkaloids isolated from plants. Aa is produced industrially for production of dyestuffs and pharmaceuticals. READ MORE

  2. 32. Modifying Cooking Practices to Reduce the Formation of Heterocyclic Amines

    University dissertation from Division of Applied Nutrition and Food Chemistry, Lund University

    Author : Elna Hallgard; Lunds universitet.; Lund University.; [2004]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Livsmedelsteknik; Food and drink technology; cancer; frying; mutagens; beefburger; chicken; heterocyclic amines; cooking;

    Abstract : Popular Abstract in Swedish Vid tillagning av kött, och framför allt stekning och grillning, bildas mutagena ämnen i stekskorpan. Dessa ämnen benämns heterocykliska aminer. Flera epidemiologiska studier har visat ett samband mellan uppkomsten av cancer och intaget av heterocykliska aminer, medan några studier inte finner något samband. READ MORE

  3. 33. Synthetic studies of heterocyclic natural products

    University dissertation from Stockholm : Karolinska Institutet, Biosciences and Nutrition

    Author : Jeffrey J Mason; Karolinska Institutet.; Karolinska Institutet.; [2009]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Heterocycles; alkaloids; natural products; luotonin A; cephalandole A; cephalandole B; benzoxazinone; tryptanthrin; ophiuroidine; pyrroloquinazolinone; isatin; Prey demethylation; pyridinium hydrochloride; demethylation; microwave synthesis;

    Abstract : The methods that were developed for the synthesis of the heterocyclic natural products luotonin A, ophiuroidine, cephalandole B, and the indol-3-yl-benzoxazinones of cephalandole A are described in this thesis. The reoccurrence of the 4(3H)-quinazolinone structure is a common theme throughout these studies, and an overview of some quinazoline chemistry is introduced in the first chapter. READ MORE

  4. 34. Silaborations of Unsaturated Compounds

    University dissertation from Stockholm : KTH

    Author : Martin Gerdin; KTH.; [2008]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; allylboration; bismetallation; boron; carbocyclization; catalysis; 1; 3-diene; enantioselective; 1; 6-enyne; interelement; N-heterocyclic carbene; nickel; palladium; phosphine; phosphoramidite; platinum; reaction mechanism; silaboration; silicon; silylborane; stereoselective; MEDICINE Chemistry; MEDICIN Kemi;

    Abstract : This thesis deals with the development of transition metal-catalyzed silaborations of 1,3-dienes and 1,6-enynes. The first part of the thesis describes the development of the enantioselective 1,4-silaboration of 1,3-cyclohexadiene. A number of chiral metal-ligand complexes were evaluated. READ MORE

  5. 35. Insights into the Molecular Mechanisms of Litter Decomposition and Assimilation of Nitrogen by Ectomycorrhizal Fungi

    University dissertation from Department of Biology, Lund University

    Author : Firoz Shah; Lunds universitet.; Lund University.; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ectomycorrhizal fungi; Paxillus involutus; organic matter degradation; Fenton chemistry; carbon availability; N assimilation; C and N cycling; protein degradation pathway; secondary metabolites;

    Abstract : Popular Abstract in English Fungi are multi-cellular eukaryotic organisms which form thread-like filaments called hyphae. They form reproductive structures called sporocarp (also known as mushrooms). Most fungi are saproptrophs, feeding on dead or decaying material while many are also parasitic, feeding on living organisms. READ MORE