Change search
Refine search result
1 - 4 of 4
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the 'Create feeds' function.
  • 1.
    Horváth, Attila
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Jonasson, Catrin
    Bäckvall, Jan-Erling
    Intramolecular Palladium(II)-Catalyzed 1,2-Addition to Allenes2000In: Journal of the American Chemical Society, ISSN 0002-7863, Vol. 122, no 40, p. 9600-9609Article in journal (Refereed)
  • 2.
    Jonasson, Catrin
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Palladium (II)-catalyzed oxidations of allenes and conjugated dienes2000Doctoral thesis, comprehensive summary (Other academic)
  • 3.
    Lindström, Ulf
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Synthesis and [3,3]-Sigmatropic Rearrangement of Vinylaziridines2000Doctoral thesis, comprehensive summary (Other academic)
    Abstract [sv]

    A general synthetic route from vinylepoxides to vinylaziridines via 1,2-amino alcohols was developed. The 1,2-amino alcohols were obtained from a stereospecific and regioselective aminolysis of vinylepoxides. The synthetic scope of the aminolysis could be expanded by the use of a microwave-assisted protocol. Some of the 1,2-amino alcohols were dehydrated with PPh3/DEAD to afford N-H vinylaziridines. All of the so obtained N-H vinylaziridines were acylated to give the corresponding N-acyl vinylaziridines. When variously substituted N-acyl vinylaziridines were subjected to LiHMDS in THF, the resulting amide enolates underwent a stereoselective aza-[3,3]-Claisen rearrangement to give mono-, di- and trisubstituted seven-membered lactams. The scope and limitations of the rearrangement were investigated. Finally, the aminolysis of vinylepoxides was applied in an asymmetric synthesis of (+)-1-deoxynojirimycin.

  • 4.
    Staaf, Mikael
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Structural and conformational studies of bacterial polysaccharides employing NMR spectroscopy2000Doctoral thesis, monograph (Other academic)
    Abstract [en]

    Methods and approaches for performing structural and conformational analysis of bacterial polysaccharides in solution are described. The structure of one exopolysaccharide from Lactobacillus helveticus and two O-antigens from Escherichia coli have been determined using NMR spectroscopy, chemical degradation and mass spectrometry. This thesis discusses different problems encountered in connection with these structural elucidations, namely, overlap of NMR signals, heterogeneity in the polysaccharide sequence and the configurations of a nonulosonic acid.

    A conformational analysis of the enterobacterial common antigen (ECA) in the form of a cyclic dodecamer is described. Nuclear Overhauser effects (NOEs) and heteronuclear three-bond coupling constants (3JCH) over the glycosidic linkages were determined and used to calculate proton-proton distances and torsion angles. Residual dipolar couplings were measured in a liquid crystalline medium. These couplings provide orientational information distinct from that contained in the local NOE and 3JCH data. The experimental data were compared to the averaged distances, three-bond proton-carbon coupling constants and C-H vector orientations in a model obtained by molecular dynamics simulations. From a fragment that were in agreement with experimental data, a three-dimensional structure was generated for the cyclic ECA in solution

1 - 4 of 4
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf