Sökning: "Armando Córdova"

Visar resultat 6 - 10 av 12 avhandlingar innehållade orden Armando Córdova.

1. 6. Wood cellulose activation dissolution, and hydrophobization

   Författare :Li Dongfang; Monica Ek; Armando Cordova; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : .... LÄS MER

3. 7. Amino acid-catalyzed synthesis of amino acid derivatives : Application and semi-synthesis of Paclitaxel, Docetaxel and their derivatives

   Författare :Pawel Dziedzic; Armando Córdova; Stephen Hanessian; Stockholms universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Organocatlysis; amino acids; syntesis; Taxol and Taxotere derivatives; Chemistry; Kemi; organisk kemi; Organic Chemistry;

   Sammanfattning : This thesis deals with different applications of organocatalysis, where amino acid derivatives and small peptides are applied as catalysts. First, the development of environmentally friendly aldol reactions, carried out in aqueous media is illustrated. The corresponding β-hydroxy ketones are formed with ee´s up to 99%. LÄS MER

4. 8. Direct Amino Acid-Catalyzed Enantioselective α-Oxidation Reactions and Asymmetric de novo Synthesis of Carbohydrates

   Författare :Magnus Engqvist; Armando Cordova; Christina Moberg; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organo catalysis; Organic chemistry; Organisk kemi;

   Sammanfattning : The ability of amino acids to form nucleophilic enamines with aldehydes and ketones has been used in the development of asymmetric α-oxidation reactions with electrophilic oxidizing agents. Singlet molecular oxygen has for the first time been asymmetrically incorporated into aldehydes and ketones, and the products were isolated as their corresponding diols in good yields and ee’s. LÄS MER

5. 9. Development of organocatalytic asymmetric transformations

   Författare :Ismail Ibrahem; Armando Cordova; Stephen Hanessian; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Asymmetric Catalysis; α-amino acids; Aldehydes; Ketones; α-Aminomethylation; Aziridination; Hydrophosphination; Diarylprolinol; Proline derivatives; Organic synthesis; Organisk syntes; Organic Chemistry; organisk kemi;

   Sammanfattning : The ability of amino acids and amino acid derivatives to mediate various organocatalytic asymmetric transformations has been investigated and applied in the development of various reactions. This work describes the development of a direct catalytic asymmetric α-aminomethylation of ketones and aldehydes, a catalytic asymmetric aziridination, hydrophosphination and amination of α,β-unsaturated aldehydes. LÄS MER

7. 10. Highly enantioselective synthesis of lactam and sugar derivatives by chiral aminocatalysis and merging with transition metal catalysis

   Författare :Zhang Kaiheng; Armando Cordova; Malkov Andrei; Mittuniversitetet; []
   Nyckelord :;

   Sammanfattning : This thesis presented novel methodologies for enantioselectivesynthesis of highly functionalized lactam and sugar derivatives.Asymmetric organocatalysis, cooperative dual catalysis and one-pot multicomponent reaction strategies were applied for the construction of continuous and quaternary stereogenic center. LÄS MER