Sökning: "organic acid"

Visar resultat 1 - 5 av 575 avhandlingar innehållade orden organic acid.

  1. 1. Some New Methods in Sialic Acid Chemistry

    Författare :Teddy Ercegovic; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; thioglycoside promoter; ganglioside; Tumor-associated antigen; lactam; lactone; sialic acid; N-acetylneuraminic acid; Neu5Ac; sialyl donor; auxiliary group; 3- S -phenylthio; bis-sialic acid lactam; 3- S -phenylseleno; silver trifluoromethanesulfonate; iodine monochloride; Organic chemistry; Organisk kemi;

    Sammanfattning : Gangliosides (G) are sialic acid-containing cell surface glycosphingolipids capable of forming lactones, i.e. inner esters. Some gangliosides are tumor-associated antigens, and they may serve as immunogens in their lactone form, where the latter is comparatively more abundant on the surface of malignant cells. LÄS MER

  2. 2. Synthesis of Organoboronic Acids and Applications in Asymmetric Organocatalysis

    Författare :Sybrand Jonker; Kálmán Szabó; Jörg Pietruszka; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Boronic acid; BINOL; allylboration; propargylation; homologation; stereoselective synthesis; asymmetric synthesis; organocatalysis; allylboronic acid; allenylboronic acid; organisk kemi; Organic Chemistry;

    Sammanfattning : Allyl- and allenylboronic acids are valuable reagents in organic synthesis due to their configurational stability and high reactivity. Few allyl- and allenylboronates are commercially available. Therefore, both the preparation and synthetic application of these organoboronic acids are subjects of study. LÄS MER

  3. 3. Development of New Methodology in Organic Synthesis: Lewis Acid-Mediated Rearrangements of Ammonium Ylides and Addition of 1, 3-bis(silyl) propenes to Aldehydes

    Författare :Pavel Tuzina; Peter Somfai; Ari Koskinen; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; asymmetric; amino acid; ammonium ylide; Lewis acid; microwave irradiation; Organic synthesis; Organisk syntes;

    Sammanfattning : This thesis deals with the development of new methodologies in organicsynthesis. The main focus is on the development of Lewis acid-mediated [1,2]-rearrangements of ammonium ylides and the novel addition of 1,3-bis(silyl)propenes to carbonyl compounds. LÄS MER

  4. 4. Tailored conjugates of N-acetylneuraminic acid and small molecules that block virus cell attachment and entry

    Författare :Emil Johansson; Mikael Elofsson; Niklas Arnberg; Geert-Jan Boons; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; N-acetylneuraminic acid; Neu5Ac; sialic acid; multivalency; Coxsackievirus A24v CVA24v ; Human adenovirus D37; D36; D26; HAdV-D37; HAdV-D26; HAdV-D36 ; 4-O-alkyl Neu5Ac; cryo-EM; branched pleconaril probes; conjunctivitis; organisk kemi; Organic Chemistry;

    Sammanfattning : Viruses are obligate intracellular parasites, unable to replicate without exploiting machinery andmaterials from host cells. Pandemics of viral diseases have had large impacts on human socieities and are continued threats to global health. LÄS MER

  5. 5. Synthesis of Organic Chromophores for Dye Sensitized Solar Cells

    Författare :Daniel Hagberg; Licheng Sun; Olof Ramström; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic Chromophores; Dye Sensitized Solar Cells; Organic chemistry; Organisk kemi;

    Sammanfattning : This thesis is divided into four parts with organic chromophores for dye sensitized solar cells as the common feature and an introduction with general concepts of the dye sensitized solar cells. The first part of the thesis describes the development of an efficient organic chromophore for dye sensitized solar cells. LÄS MER