Sökning: "domino"

Visar resultat 21 - 25 av 32 avhandlingar innehållade ordet domino.

1. 21. Stereoselective Nucleophilic Additions to Aldehydes and Development of New Methodology in Organic Synthesis

   Författare :Tessie Borg; Olof Ramström; Siméon Arseniyadis; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : This thesis is divided into four separate parts with nucleophilic addition to aldehydes as the common feature in three of them.The first part deals with the investigation of the stereochemical induction and elucidation of the factors that dictate the p-facial selectivities in Mukaiyama aldol addition to a- and a,b-heteroatom substituted aldehydes. LÄS MER

3. 22. Rearrangements to vinyl substituted hetero- and carbocycles : Total synthesis of siphonazole B and otherapplications in oxazole and saturated ringsynthesis

   Författare :Filip Paulsen; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The aim of this thesis is to explore and develop new reactions for rapid generation of molecular complexity. Byenabling access to important molecules in a less wasteful and more cost-efficient manner such developmentbenefits the whole modern society, where increasingly complex molecules are needed to solve problems withinfields ranging from medicine, to materials sciences and the perfume industry. LÄS MER

4. 23. Natural Product Synthesis and Development of Novel Reaction Methodology

   Författare :Jakob Danielsson; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; perophoramidine; communesin; quaternary stereocenter; Diels-Alder; 1; 2-asymmetric induction; polar Felkin-Anh; Cornforth-Evans; Mukaiyama aldol; 3-dipolar cycloaddition; azomethine ylide; 2-amino alcohol; anti-α-amino-β-hydroxy ester;

   Sammanfattning : This thesis deals with the development of new reaction methodology for stereoselective synthesis, as well as total synthesis of natural products and investigations of the stereochemical outcome in the Mukaiyama aldol reaction. Chapter 2 describes efforts made towards the total synthesis of the oxindole natural products perophoramidine and the communesin. LÄS MER

5. 24. The internationalization processes of freight transport companies : towards a dynamic network model of internationalization

   Författare :Susanne Hertz; Handelshögskolan i Stockholm; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

   Sammanfattning : Internationalization of industries, international competition, and the deregulation and harmonization within the EC are some of the important factors changing the prerequisites and requirements for effective international transport systems. Thus there is a need for more articulated knowledge regarding the internationalization processes of freight transport companies. LÄS MER

7. 25. Resolution of Dynamic Systems: Applications in Asymmetric Synthesis and Materials Science

   Författare :Lei Hu; Olof Ramström; Douglas Philp; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Kemi; Chemistry;

   Sammanfattning : This thesis is built on the concepts of constitutional dynamic chemistry and dynamic kinetic resolution, where reversible covalent reactions are used to generate dynamics and kinetically controlled reactions are employed for resolution. The thesis is divided into two parts:The first section focuses on the study of dynamic systemic resolution, a concept derived from constitutional dynamic chemistry. LÄS MER