Sökning: "benzaldehyde"

Visar resultat 1 - 5 av 24 avhandlingar innehållade ordet benzaldehyde.

  1. 1. C2- and C3-symmetric ligands via ring-opening of aziridines

    Författare :Fredrik Lake; KTH; []
    Nyckelord :asymmetric catalysis; aziridine; benzaldehyde; diethylzinc; enantionselective; ligand; proazaphosphatrane; ring-opening; sulfonamide; symmetry; titanium; nicronium;

    Sammanfattning : This thesis deals with the design and synthesis of chiralenantiopure nitrogencontaining ligands and the use of theseligands in asymmetric catalysis. A modular synthetic approachto enantiopure nitrogen-containing ligands was developed. Thesynthetic method is based on the ring-opening of activatedchiral aziridines by nitrogen nucleophiles. LÄS MER

  2. 2. Isolation, Synthesis and Structure-Activity Relationships of Antifeedants against the Pine Weevil, Hylobius Abietis

    Författare :Carina Eriksson; Christina Moberg; John Pickett; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Pine weevil; Hylobius abietis; semiochemicals; antifeedant; feeding deterrent; feeding stimulant; bark extract; carboxylic acid; piperidine alkaloids; structure-activity; cinnamic aldehyde; benzaldehyde; Organic chemistry; Organisk kemi;

    Sammanfattning : The large pine weevil, Hylobius abietis L., is a major insect pest on conifer seedlings in northern Europe. Due to its feeding newly planted trees get girdled, resulting in high seedling mortality (up to 80%). As a consequence great financial losses to the forest industry occur. LÄS MER

  3. 3. Efficient Synthesis and Analysis of Chiral Cyanohydrins

    Författare :Stina Lundgren; Christina Moberg; Ben Feringa; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; asymmetric catalysis; cyanohydrins; microreactor; polymersupported catalyst; ketonitriles; titanium; lanthanide; Lewis acid; Lewis base; Organic chemistry; Organisk kemi;

    Sammanfattning : This thesis deals with the development of new methods for efficient synthesis and analysis in asymmetric catalysis. It focuses on the preparation of chiral cyanohydrins by enantioselective addition of cyanide to prochiral aldehydes. LÄS MER

  4. 4. Contact allergens in p-tert-butylphenol-formaldehyde resin

    Författare :Erik Zimerson; Yrkes- och miljödermatologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Dermatology; main allergens; structure-activity relationships; identification of contact allergens; guinea pig maximization test; p-tert-butylphenol-formaldehyde resin; patch testing; venereology; Dermatologi; venereologi;

    Sammanfattning : p-tert-Butylphenol-formaldehyde resin (PTBP-F-R) is used as a binder in many adhesive formulations and it consists of a complex mixture of substances, most of which are unknown. The resin has been reported to cause allergic contact dermatitis since the 1950s. LÄS MER

  5. 5. Synthesis of amino- and hydroxyl-substituted bridged bicyclic compounds and their application in asymmetric catalysis

    Författare :Cecilia Olsson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; organocatalysis; asymmetric catalysis; bicyclo[2.2.1]heptane; bicyclo[2.2.2]octane; dibenzobicyclo[3.3.1]nonane; bioreduction; enzymatic kinetic resolution;

    Sammanfattning : In this work, hydroxyl- and amino-substituted bridged bicyclic compounds based on bicyclo[2.2.1]heptane, bicyclo[2.2. LÄS MER