Sökning: "salts"

Visar resultat 1 - 5 av 300 avhandlingar innehållade ordet salts.

1. 1. Iodonium Salts : Preparation, Chemoselectivity and Metal-Catalyzed Applications

   Författare :Joel Malmgren; Berit Olofsson; Jérome Waswer; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Diaryliodonium salts; chemoselectivity; heterogeneous catalysis; organisk kemi; Organic Chemistry;

   Sammanfattning : This thesis concerns the preparation and use of diaryliodonium salts. In Project I various unsymmetrical diaryliodonium salts were reacted with three different nucleophiles in order to study the chemoselectivity of the reactions of the salts. LÄS MER

3. 2. Diaryliodonium Salts : Synthesis, Applications and Computational Investigations

   Författare :Marcus Reitti; Berit Olofsson; Michael Greaney; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; diaryliodonium salt; hypervalent iodine; density functional theory; aryne; phenol; nitroarene; organisk kemi; Organic Chemistry;

   Sammanfattning : Organic chemists have the ability to create complex organic molecules by connecting molecular building blocks in different ways. To name a few, these molecules are used as medicines, pesticides or in our household electronics, and are therefore crucial to life as we know it. LÄS MER

4. 3. Diaryliodonium Salts : Development of Synthetic Methodologies and α-Arylation of Enolates

   Författare :Marcin Bielawski; Berit Olofsson; Antonio Togni; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Hypervalent Iodine Compounds; One-Pot Synthesis; Regiospecific Synthesis; Aromatic Substitution; Aryl Iodides; Arenes; Boronic Acids; Heteroaromatics; Arylations; Reaction Mechanisms; Density Functional Calculations; Large Scale Synthesis; Organic synthesis; Organisk syntes; organisk kemi; Organic Chemistry;

   Sammanfattning : This thesis describes novel reaction protocols for the synthesis of diaryliodonium salts and also provides an insight to the mechanism of α-arylation of carbonyl compounds with diaryliodonium salts.  The first chapter gives a general introduction to the field of hypervalent iodine chemistry, mainly focusing on recent developments and applications of diaryliodonium salts. LÄS MER

5. 4. Metal‐Free Arylations of Oxygen and Nitrogen Nucleophiles : Applications of Diaryliodonium Salts

   Författare :Elin Stridfeldt; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; arylation; aryloxyamines; cyclization; diaryliodonium salts; O-aryloximes; sigmatropic rearrangement;

   Sammanfattning : This thesis concerns development of new methods for metal‐free arylations in organic synthesis. The protocols discussed in the thesis are based on a class of hypervalent iodine compounds called diaryliodonium salts. These reagents are known to transfer aryl moieties to suitable nucleophiles. LÄS MER

7. 5. Unsymmetrical Diaryliodonium Salts : Development and Chemoselectivity studies

   Författare :Joel Malmgren; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The first part describes a chemoselectivity study on diaryliodonium salts where oxygen, nitrogen and carbon nucleophiles have been arylated. Twelve different unsymmetric phenyl(aryl)iodonium salts were designed with a systematic variation of the steric and electronic properties of the aryl group. LÄS MER