Sökning: "bromination"

Visar resultat 1 - 5 av 18 avhandlingar innehållade ordet bromination.

  1. 1. Carbocation Catalysis for Organic Synthesis

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

    Sammanfattning : 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. LÄS MER

  3. 2. Synthesis and electrophilic substitution studies on thienyl, furyl and pyrrolyl 5-methyl 1,3,4,6- tetraaza[3.3.3]cyclazines

    Författare :Gudrun Gudbjartsdóttir; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nitration and iodination; bromination; cyclazine;

    Sammanfattning : .... LÄS MER

  4. 3. Local and global contaminants in Swedish waters : studies on PCBs, DDTs, 4,5,6-trichloroguaiacol and their transformation products in fish and sediments

    Författare :Maria Söderström; Åke Bergman; Bert van Bavel; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; PCB; DDT; HCB; trichloroguaiacol; transformation products; dimerisation; bromination; environmental pollutants; eutrophication; lakes; fresh water; baltic sea; monitoring; sediments; fish; phytoplankton; PCB; DDT; HCB; triklorguajakol; omvandlingsprodukter; dimerisering; bromering; miljöföroreningar; eutrofiering; sjöar; sötvatten; östersjön; miljöövervakning; sediment; fisk; fytoplankton; miljökemi; Environmental Chemistry;

    Sammanfattning : This thesis is focused on studies on the environmental fate and methodological improvements for determination of the global contaminants, PCBs and DDTs, and locally discharged phenolics, e.g. 4,5,6-trichloroguaiacol (4,5,6-TCG), and their transformation products. LÄS MER

  5. 4. Syntheses of 11C and 76Br labeled compounds via organostannanes using the Stille cross-coupling reaction and oxidative bromination

    Författare :Aiping Cheng; Uppsala universitet; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  7. 5. Synthesis and characterization of highly polybrominated diphenyl ethers

    Författare :Daniel Teclechiel; Göran Marsh; Vladimir Nikiforov; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; Miljökemi; Environmental Chemistry; miljökemi;

    Sammanfattning : Polybrominated diphenyl ethers (PBDEs) make up an important class of brominated flame retardants. The present production is mainly concentrated to DecaBDE but until recently also a significant production of PentaBDE and OctaBDE took place, leaving us with a large number of different PBDE congeners. LÄS MER