Sökning: "pyranosides"

Hittade 5 avhandlingar innehållade ordet pyranosides.

  1. 1. Lewis acid promoted endocyclic cleavage of glycosides and related acetals

    Författare :Roger Olsson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; halichomycin; allylation; carbene; hydrogen bond; organozinc; organotitanium; furanosides; organoaluminium; pyranosides; glycosides; stereoselective; endocyclic cleavage; nucleophilic ring opening; ab initio; Organic chemistry; Organisk kemi;

    Sammanfattning : This thesis is a summary of five papers concerning endocyclic cleavage of glycosides and related acetals. Simple lactol ethers undergo endocyclic cleavage to give acyclic chain extended products on treatment with organoaluminium and organotitanium reagents. LÄS MER

  3. 2. Development of methods for stereospecific synthesis of α- and β-D-fructofuranosides and β-D-glucuronic acid pyranosides and application of these methods in the assembly of bacterial polysaccharide structures

    Författare :Christian Krog-Jensen; Michael Bols; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Organisk kemi; Organic Chemistry; organisk kemi;

    Sammanfattning : .... LÄS MER

  4. 3. Synthesis of biologically interesting oligosaccharides containing residues with manno-configuration and acid-catalyzed opening of 4,6-orthoesters of pyranosides

    Författare :Maria Szönyi; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organisk Föreningar; Alifatiska; Cykliska;

    Sammanfattning : .... LÄS MER

  5. 4. Structural studies of two bacterial polysaccharide antigens : synthesis and chemical modification of low molecular weight carbohydrates

    Författare :Carmen Ortega; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The structures of two bacterial antigens, one a capsular polysaccharide from Klebsiella K66 and the other a lipopolysaccharide from Escherichia coli 0:6, have been determined, using specific degradations and spectrochemical studies. Two glycosidation methods are described. LÄS MER

  7. 5. Studies of the anomeric center : mechanism and synthesis

    Författare :Karl-Jonas Johansson; Harri Lönnberg; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic Chemistry; organisk kemi;

    Sammanfattning : This thesis is based on three publications and one appendix and is divided into two parts. The first part is a mechanistic study of the anomerization reaction of both aldo and keto glycosides and the second part is a synthetic study of a unusual type of glycosidic linker found in the lipopolysaccharide core Proteus Mirabilis 0270. LÄS MER