Enzymatic Kinetic Resolution
Mostrando 1-12 de 15 artigos, teses e dissertações.
-
1. Chemoenzymatic Synthesis of Apremilast: A Study Using Ketoreductases and Lipases
The key step in the chemoenzymatic synthesis of apremilast was to produce the chiral alcohol (R)-1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethanol, (R)-3. Two enzymatic approaches were evaluated to obtain (R)-3, one using ketoreductases and the other lipases. Bioreduction of 1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethanone (2), using ketoreductas
J. Braz. Chem. Soc.. Publicado em: 2021-05
-
2. BIOPRODUCTION AND CHARACTERIZATION OF SODIUM, POTASSIUM, AND CALCIUM LACTOBIONATES
Lactobionic acid and its salts are substances that have several applications in the pharmaceutical area. These products were obtained by bioconversion through the enzymatic complex glucose-fructose-oxidoreductase (GFOR)/gluconolactonase (GL) present in calcium alginate immobilized cells of Zymomonas mobilis. In the reactions catalyzed by this enzyme system,
Quím. Nova. Publicado em: 2017-09
-
3. Simplification of Lipase Design in the Enzymatic Kinetic Resolution of Amines by Saturation Transfer Difference NMR
In this work, we demonstrate a nuclear magnetic resonance (NMR) method for racemic amide and lipase interaction as a first-pass design method in the enzymatic kinetic resolution of amines. As a novel adaptation of commonly used protein-ligand screening NMR methodologies, this approach relies upon a lipase-amide interaction wherein the time-consuming is reduc
J. Braz. Chem. Soc.. Publicado em: 2016-10
-
4. Fast Microwave-Assisted Resolution of (±)-Cyanohydrins Promoted by Lipase from
Candida antarctica Enzymatic kinetic resolution (EKR) of (±)-cyanohydrins was performed by using immobilized lipase from
Candida antarctica (CALB) under conventional ordinary conditions (orbital shaking) and under microwave radiation (MW). The use of microwave radiation contributed very expressively on the reduction of the reaction time from 24 to 2 h. MosJ. Braz. Chem. Soc.. Publicado em: 2015-07
-
5. Study of kinetic resolution of secondary alcohols by enantioselective oxidation mediated by bacteria / Estudo de resolução cinética de álcoois secundários utilizando reação de oxidação enantiosseletiva mediada por bactérias
Nesta dissertação de mestrado foram estudadas duas bactérias, Sphingobacterium sp e Arthrobacter atrocyaneus, produtoras de enzimas álcool desidrogenases que se mostraram capazes de catalisar reações de oxidação enantiosseletiva de alcoóis secundários racêmicos. Inicialmente foram avaliados alguns parâmetros para a realização da resolução cin
Publicado em: 2010
-
6. Enzymatic kinetic resolution of (RS)-1-(Phenyl)ethanols by Burkholderia cepacia lipase immobilized on magnetic nanoparticles
A lipase proveniente da Burkholderia cepacia imobilizada em nanopartículas superparamagnéticas usando diferentes metodologias de imobilização (adsorção e quimiosorção) foi eficientemente aplicada como biocatalisador reciclável na resolução cinética de (RS)-1-(fenil)etanols através de reações de transesterificação. Os (R)-ésteres e os (S)-al
Journal of the Brazilian Chemical Society. Publicado em: 2010
-
7. Imobilização da lipase de Burkholderia cepacia em nanopartículas magnéticas e sua applicação em resolução cinética de alcoóis secundários quirais / Immobilization of Burkholderia cepacia lipase on magnetic nanoparticles and its application in enzymatic kinetic resolution of chiral secondary alcohols
Esta dissertação apresenta um estudo de diferentes metodologias de imobilização (fisissorção, quimissorção com carboxibenzaldeído e quimissorção com glutaraldeído) da lipase de Burkholderia cepacia em nanopartículas magnéticas e sua aplicação na resolução cinética de alcoóis secundários racêmicos. O método de imobilização por fisisso
Publicado em: 2009
-
8. Biorreciclagem de hexano e estudo de reações de óxido-redução usando plantas comestíveis / Biorecycling of hexane and study of oxido-reduction reactions using edible plants
The present work had as main goals the use of enzymatic reactions to degrade laboratory residues and to synthesize chiral alcohols. In the first part, it was carried out a screening of microorganisms and hydrolytic enzymes aiming the biorecycling of hexane from laboratory residues (a mixture of hexane-ethyl acetate). This misture is widely employed to purify
Publicado em: 2008
-
9. High-throughput screening in enzyme assays for epoxide hydrolases and monooxygenases activity detection using whole cell / Triagem de alto desempenho para detecção de atividade de epoxido-hidrolases e monooxigenases utilizando celulas integras
Biocatalysis is a multidisciplinary area, where new technologies are developing rapidly in order to offer unique options and solutions to different organic chemistry problems, complementing the classical synthetic chemistry. Facing the need imposed by progress in this area, this project aims at the implementation of high-throughput screening (HTS) methodolog
Publicado em: 2006
-
10. Application of biocatalysis in the enantioselective synthesis of chiral gamma-butyrolactones: new reagents for the stereoselective preparation of analogous of vitamin A / Aplicação da biocatálise na síntese de γ-butirolactonas bioativas quirais: novos reagentes visando a preparação estereosseletiva de análogos da vitamina A
The first chapter of this thesis is dedicated to the studies on the application of biocatalysis in the synthesis of chiral γ-butyrolactones. We started investigating the preparation of phenylselanyl-γ-butyrolactones through the kinetic enzymatic resolution of the corresponding phenylselanyl-γ-hydroxyesters. By using this strategy both enantiom
Publicado em: 2005
-
11. Determination of the crystallographic structure of the human glucose-6-phosphate isomarase by x-ray diffraction / Determinação da estrutura cristalográfica por difração de raios-x da enzima glicose 6-fosfato isomerase humana
This work is presented as part of the Master degree requirements of the Applied Physics program, Biomolecular Physics area. The purpose of this work is the structural study by of the human glucose-6-phosphate isomerase (PGI-hum). This work has involved mainly three areas: Molecular Biology, Biochemistry and Crystallography. The Molecular Biology work was int
Publicado em: 2001
-
12. Resolution of organelle docking and fusion kinetics in a cell-free assay
In vitro assays of compartment mixing have been key tools in the biochemical dissection of organelle docking and fusion. Many such assays measure compartment mixing through the enzymatic modification of reporter proteins. Homotypic fusion of yeast vacuoles is measured with a coupled assay of proteolytic maturation of pro-alkaline phosphatase (pro-ALP). A kin
National Academy of Sciences.