Sökning: "Arylations"

Visar resultat 1 - 5 av 11 avhandlingar innehållade ordet Arylations.

1. 1. 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

3. 2. 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

4. 3. Hypervalent Iodine Reagents in Metal-Free Arylations and Vinylations : Investigation of Suitable Coupling Partners and Synthesis of New Reagents

   Författare :Elin Stridfeldt; Berit Olofsson; Zoltán Novák; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Diaryliodonium Salts; Benzofurans; Aryl Ethers; Secondary Amides; Vinylbenziodoxolones; organisk kemi; Organic Chemistry;

   Sammanfattning : This thesis concerns the development of metal-free reactions to obtain carbon-heteroatom and carbon-carbon bonds. This is achieved by transferring carbon ligands from hypervalent iodine reagents to suitable nucleophiles. LÄS MER

5. 4. Transition Metal-Free O-, N- and S-Arylations with Diaryliodonium Salts

   Författare :Gabriella Kervefors; Berit Olofsson; Boris Nachtsheim; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Amines; hypervalent iodine; electrophilic arylation; methodology development; total synthesis; organisk kemi; Organic Chemistry;

   Sammanfattning : This thesis concerns the development of metal-free arylation procedures using diaryliodonium salts, a non-toxic and versatile electrophilic arylating reagent, with applications to synthesize biologically relevant targets.The first part describes a transition metal-free formal synthesis of phenoxazine with an O-functionalization of a certain phenol as a key step. LÄS MER

7. 5. Regioselective intramolecular palladium-catalyzed and radical mediated arylations of cyclic enamidines and enamides

   Författare :Lena Ripa; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; PHARMACY; FARMACI;

   Sammanfattning : .... LÄS MER