Search for dissertations about: "allylic alcohol"

Showing result 1 - 5 of 24 swedish dissertations containing the words allylic alcohol.

2. 1. Iridium Catalysed Asymmetric Hydrogenation of Olefins and Dynamic Kinetic Resolution in the Asymmetric Hydrogenation of Allylic Alcohols

   Author : Jianguo Liu; Pher G Andersson; Xiao Jianliang; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Iridium catalyst; asymmetric hydrogenation; dynamic kinetic resolution; allylic alcohol; organisk kemi; Organic Chemistry;

   Abstract : The work described in this thesis is focused on exploring the efficacy of iridium-catalysed asymmetric hydrogenation of precursors to chiral alcohols and chiral cyclohexanes. A range of allylic alcohols including γ,γ-dialkyl allylic alcohols and (Z)-allylic alcohols were prepared and evaluated in the asymmetric hydrogenation using iridium catalysts resulting in chiral alcohols in high yields and excellent enantioselectivity. READ MORE

4. 2. Chiral Pyridine-Containing Ligands for Asymmetric Catalysis. Synthesis and Applications

   Author : Fredrik Rahm; KTH; []
   Keywords : asymmetric catalysis; chiral ligand; chiral pool; oxazoline; crown ether; ditopic receptor; bipyridine; pyridyl alcohol; modular approach; P; N-ligand; diethylzinc; allylic alkylation;

   Abstract : This thesis deals with the design and syntheses of chiral,enantiopure pyridinecontaining ligands and their applicationsin asymmetric catalyis.Chiral pyridyl pyrrolidine ligands and pyridyl oxazolineligands were synthesized and employed in thepalladium-catalysed allylic alkylation of 1,3-diphenyl-2-propenyl acetate with dimethyl malonate. READ MORE

5. 3. Development of New Chiral Bicyclic Ligands : Applications in Catalytic Asymmetric Transfer Hydrogenation, Epoxidations, and Epoxide Rearrangements

   Author : Arnaud Gayet; Andersson Pher G.; Hilmersson Göran; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; asymmetric catalysis; transfer hydrogenation; epoxide rearrangement; Organocatalysed epoxidation; chiral ligand; allylic alcohol; kinetic resolution; lithium amide; Organisk kemi; Organic chemistry; Organisk kemi;

   Abstract : This thesis describes the synthesis and application of new chiral bicyclic ligands and their application in asymmetric catalysis. The studies involved: [i] The development of novel chiral bicyclic amino sulfur ligands and their use in transfer hydrogenation. READ MORE

6. 4. Asymmetric Formation and Isomerization of Three-Membered Rings : Catalyst Development and Evaluation

   Author : Sophie Bertilsson; Tobias Rein; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chemistry; allylic alcohol; α-amino acid derivative; aza-Diels-Alder reaction; aziridination; cyclopropanation; desymmetrization; epoxide rearrangement; kinetic resolution; lithium amide; rhodium-carboxylate; Kemi; Chemistry; Kemi; organisk kemi; Organic Chemistry;

   Abstract : Enantiopure α-amino acid derivatives were prepared using a protocol which allows for highly controlled regio- and chemoselectivity in the hydrogenation/ hydrogenolysis of aza-Diels-Alder adducts. One of the resulting α-amino esters, (1S,3R,4R)-2-azabicyclo[2.2.1]heptane-3-carboxylic acid ethyl ester, was utilized further as a catalyst precursor. READ MORE

7. 5. Asymmetric hydrogenation of allylic alcoholsusing iridium catalysts

   Author : Jianguo Liu; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; organisk kemi; Organic Chemistry;

   Abstract : The first part of this thesis is focussed on the enantioselective iridium catalyzeda symmetric hydrogenation of allylic alcohols. The study involved the preparation of a range of allylic alcohols. READ MORE