Search for dissertations about: "organic products"

Showing result 11 - 15 of 512 swedish dissertations containing the words organic products.

  2. 11. Carbocation Catalysis for Organic Synthesis

    Author : Shengjun Ni; Johan Franzén; Bernd Plietker; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; carbocation; trityl cation; Lewis acid catalyst; enantioselective; chiral counteranion; oxa-Diels–Alder; bromination; aldehyde–olefin metathesis; Kemi; Chemistry;

    Abstract : The most common view of carbocations in organic chemistry is that they are short-lived intermediates in several fundamental reactions, e.g. the classic SN1-reaction. READ MORE

  4. 12. Organocatalytic Domino Reactions

    Author : Henrik Sundén; Armando Córdova; Pavel Kočovský; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; organocatalytic; domino; iminium-enamine; enamine-iminium; Organic chemistry; Organisk kemi; Organic Chemistry; organisk kemi;

    Abstract : Organocatalyzed reactions involving activation strategies of ketones and aldehydes are important processes in organic chemistry. These activation strategies serve as a versatile platform for the construction of several domino reactions. READ MORE

  5. 13. Chemo- and Enantioselective Hydrogenations : The Struggle of Expanding the Substrate Scope of Iridium Catalyzed Asymmetric Hydrogenations of Olefins

    Author : Mattias Engman; Pher G. Andersson; Lise-Lotte Gundersen; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Organisk kemi; Organisk kemi; Organic Chemistry;

    Abstract : The asymmetric hydrogenation of olefins is a facile and popular method of reaching chiral products. Whereas ruthenium- and rhodium-catalyzed asymmetric hydrogenations have a long history, the use of iridium in this area is new but fast-growing. READ MORE

  6. 14. Novel biologically active compounds by semisynthesis with fungal metabolites

    Author : Johan Eriksson Bajtner; Centrum för analys och syntes; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organisk kemi; Organic chemistry; bioactive compounds.; isovelleral; podoscyphic acid; Natural products; semisynthesis;

    Abstract : Natural products have been shown to be an important source of novel compounds for the development of new drugs and pesticides. However, many biologically active natural products contain reactive functionalities that make them toxic. READ MORE

  7. 15. Synthetic and Mechanistic Studies with Iodine(III) Reagents

    Author : Ester Maria Di Tommaso; Berit Olofsson; Marcos Suero; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; hypervalent iodine chemistry; organic synthesis; mechanistic studies; DFT; photocatalysis; Organic Chemistry; organisk kemi;

    Abstract : This thesis describes the development of metal-free transformations and mechanistic studies on the reactivity of two classes of hypervalent iodine reagents: diaryliodonium salts and vinylbenziodoxolones (VBX). Recently, they have been recognized as valuable synthetic reagents with broad applicability in organic synthesis. READ MORE