Sökning: "wittig"

Visar resultat 11 - 13 av 13 avhandlingar innehållade ordet wittig.

1. 11. Organic Photochemistry. Scope and Limitations of Twofold Adiabatic Cis-Trans Isomerizations

   Författare :Ingjald Anger; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : To investigate the scope and limitations of twofold adiabatic cis/trans photoisomerizations, a number of bis-stilbenes and bisstyryl compounds have been prepared and studied in the excited singlet or triplet states. Their structures vary according to the size of the .pi. LÄS MER

3. 12. Novel Organophosphorus Compounds for Materials and Organic Synthesis

   Författare :Keyhan Esfandiarfard; Sascha Ott; Declan Gilheany; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : This thesis is devoted to the development of new organophosphorus compounds for potential uses in material science and as reagents in Organic Chemistry. Organophosphorus compounds in a single molecule or organic electronics context are appealing as the phosphorous centers perturb the electronic properties of the π-conjugated systems while at the same time provide synthetic handles for subsequent synthetic modifications. LÄS MER

4. 13. Late-stage 11C-carbonylation of drug-like molecules for PET

   Författare :Kaisa Horkka; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : Positron emission tomography (PET) is a non-invasive in vivo imaging technique used for translational biomedical research and clinical diagnosis. A fundamental pre-condition for PET is the radiolabelled tracer molecule used in the emission measurement, and there is a pressing need to accelerate the development of novel PET tracers to meet an increasing demand from the healthcare system, academia and drug industry. LÄS MER