Sökning: "Armando Cordova"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden Armando Cordova.

1. 1. Regioselective acylation of carbohydrates and polyester synthesis by lipase catalysis

   Författare :Armando Córdova; KTH; []
   Nyckelord :;

   Sammanfattning : The lipases' high regio- and enantioselectivity, activity inorganic solvent and environmentally compatible reactionconditions have made lipase-catalysis based synthesis anattractive alternative to conventional synthetic methods inorganic chernistry and a new synthetic tool in polymerchemistry.The regioselective acylation of methy1 glycopyranosides wereinvestigated using several serine hydrolases. LÄS MER

3. 2. Development of catalytic enantioselective C-C bond-forming and cascade transformations by merging homogeneous or heterogeneous transition metal catalysis with asymmetric aminocatalysis

   Författare :Samson Afewerki; Armando Córdova; MICHELANGELO GRUTTADAURIA; Mittuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; asymmetric catalysis; transition metals; aldehydes; heterogeneous catalysis; amino acid; organocatalysis; α-allylation; β-alkylation; dynamic transformations; polysubstituted; carbocycles; spirocyclic oxindoles; all-carbon quaternary stereocenters;

   Sammanfattning : Chiral molecules play a central role in our daily life and in nature, for instance the different enantiomers or diastereomers of a chiral molecule may show completely different biological activity. For this reason, it is a vital goal for synthetic chemists to design selective and efficient methodologies that allow the synthesis of the desired enantiomer. LÄS MER

4. 3. Eco-friendly and Catalytic Surface Engineering of Cellulose and Nanocellulose

   Författare :Rana Alimohammadzadeh; Armando Cordova; Dan Bylund; Monica Ek; Mittuniversitetet; []
   Nyckelord :;

   Sammanfattning : The non-stop use of petroleum-based materials such as plastics can generate significant environmental problems, including pollution of the oceans and increased CO2 levels, and cause diseases like cancer due to the starting monomers. Consequently, increased use of sustainable and non-toxic polymers and monomers is required to address these issues. LÄS MER

5. 4. Development of highly enantioselective organocatalyzed transformations

   Författare :Palle Breistein; Armando Córdova; Mittuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Asymetric catalysis; aldehydes; proline derivatives; transition metals; Friedel-Crafts; conjugate addition; boration; α-alkylation;

   Sammanfattning : .... LÄS MER

7. 5. Development of Catalytic Enantioselective Approaches for the Synthesis of Carbocycles and Heterocycles

   Författare :Luca Deiana; Armando Córdova; Andrei Malkov; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organocatalysis; Asymmetric Catalysis; Heterogeneous Catalysis; Aziridines; Pyrazolidines; Cyclopentanes; organisk kemi; Organic Chemistry;

   Sammanfattning : In biological systems, most of the active organic molecules are chiral. Some of the main constituents of living organisms are amino acids and sugars. They exist predominantly in only one enantiomerically pure form. LÄS MER