Sökning: "Dr Hans Adolfsson"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Dr Hans Adolfsson.

  1. 1. Catalytic Formation of Amides

    Författare :Fredrik Tinnis; Hans Adolfsson; Jonathan Williams; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; organisk kemi; Organic Chemistry;

    Sammanfattning : The amide functionality is a highly important chemical bond, found in a great number of synthetic products such as pharmaceuticals, polymers and agrochemicals. The focus of this thesis has been directed towards efficient, mild and environmentally friendly methods for amide formations. LÄS MER

  3. 2. Transition metal catalyzed reduction of ketones

    Författare :Elina Buitrago; Hans Adolfsson; Joseph Samec; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Organisk kemi;

    Sammanfattning : .... LÄS MER

  4. 3. Stereoselective Nucleophilic Additions to Aldehydes and Synthesis of α-Amino-β- Hydroxy-Esters

    Författare :Jakob Danielsson; Peter Somfai; Hans Adolfsson; Tobias Rein; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Asymmetric induction; stereochemical models; Mukaiyama; polar Felkin-Anh; Cornforth-Evans; 1; 3-dipole; aziridine; cycloaddition; amino alcohol; carbonylation; Heck reaction; quaternary stereocenter;

    Sammanfattning : This thesis deals with the development of new reaction methodology as well as stereochemical investigations. The first part concerns the investigation of 1,2- and merged 1,2- and 1,3- asymmetric induction in Mukaiyama aldol additions to α-heteroatom and α,β- heteroatom substituted aldehydes respectively. LÄS MER

  5. 4. Group (IV) Metal-Catalyzed Direct Amidation : Synthesis and Mechanistic Considerations

    Författare :Helena Lundberg; Adolfsson Hans; Tom Sheppard; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; catalysis; amide; carboxylic acid; amino acid; titanium; zirconium; hafnium; organisk kemi; Organic Chemistry;

    Sammanfattning : The amide unit constitutes the backbone of proteins, and it is present in a large number of pharmaceutically active molecules, polymeric materials such as nylon and Kevlar, as well as in food additives like aspartame. Amides are produced in enormous amounts every year, thus, environmentally friendly and selective methods for their formation are of great importance. LÄS MER

  7. 5. Developments in the Field of Aza-Diels-Alder Reactions, Catalytic Michael Additions and Automated Synthesis

    Författare :Stefan Modin; Pher Andersson; Lars Engman; Hans Adolfsson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Asymmetric synthesis; aza-Diels-Alder; Michael addition; Transfer hydrogenation; automated synthesis; Catalysis; Organisk kemi; Organic chemistry; Organisk kemi;

    Sammanfattning : The development of new aza-bicyclic structures with potential applications as ligands synthesised via an aza-Diels-Alder cycloaddition has been studied. The studies are concerning the i) development of large scale aza-Diels-Alder reaction, ii) development of a fast and simple route to bicyclic diamine ligands, iii) development of new aza-Diels-Alder adducts from different dienes, iv) development and application of bicyclic N,P ligands for catalytic Michael additions and v) development of robotized asymmetric transfer hydrogenation reactions. LÄS MER