Bioreduction
Mostrando 1-12 de 27 artigos, teses e dissertações.
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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
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2. A RENEWABLE CATALYST FOR A RENEWABLE CHEMICAL: GRAM-SCALE CONVERSION OF FURFURAL TO FURFURYL ALCOHOL BY THE CARROT (Daucus carota)
The bioconversion of furfural to furfuryl alcohol using only carrot bits in water at room temperature and ambient pressure is presented. This reaction led to the bioreduction of furfural with 99% conversion and 99% selectivity to an alcohol. This simple and “fully” green process may represent an alternative to classic hydrogenation processes. Also, witho
Quím. Nova. Publicado em: 2020-01
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3. Medicinal Electrochemistry of Halogenated and Nitrated Pterocarpanquinones
Electrochemical methods are considered useful tools for simulations of biological redox reactions. The activities of quinones depend on their bioreduction. Biologically active pterocarpanquinones LQB-149 (nitroderivative), 150 and 151 (bromo and chloroderivatives, respectively) were electrochemically investigated by cyclic voltammetry, differential pulse vol
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
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4. Phytofabrication of silver nanoparticles using Myriostachya wightiana as a novel bioresource, and evaluation of their biological activities
ABSTRACT Nanobiotechnology deals with the properties of nanomaterials and their potential uses. Here we report for the first time novel, cost-effective and eco-friendly method for the rapid green synthesis of silver nanoparticles (AgNPs) using leaf extracts of Myriostachya wightiana. The growth of silver nanoparticles was monitored by UV-vis spectroscopy co
Braz. arch. biol. technol.. Publicado em: 17/08/2017
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5. Asymmetric bioreduction of β-ketoesters derivatives by Kluyveromyces marxianus: influence of molecular structure on the conversion and enantiomeric excess
ABSTRACT This study presents the bioreduction of six β-ketoesters by whole cells of Kluyveromyces marxianus and molecular investigation of a series of 13 β-ketoesters by hologram quantitative structure-activity relationship (HQSAR) in order to relate with conversion and enantiomeric excess of β-stereogenic-hydroxyesters obtained by the same methodology. F
An. Acad. Bras. Ciênc.. Publicado em: 07/08/2017
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6. Improving the Toolbox of Bioreductions by the Use of Continuous Flow Systems
Packed bed reactors can be used as an interesting alternative on the bioreduction of β-ketoesteres mediated by immobilized microorganisms. Here in, we report our results on the bioreduction of ethyl 3-oxohexanoate by immobilized Kluyveromyces marxianus cells and tert-butyl 3-oxobutanoate by immobilized Rhodotorula rubra cells under continuous flow condition
J. Braz. Chem. Soc.. Publicado em: 2015-03
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7. Use of Saccharomyces cerevisiae yeasts in the chemoselective bioreduction of (1E,4E)-1,5-bis(4-methoxyphenyl)-1,4-pentadien-3-one in biphasic system
Este trabalho descreve a biorredução quimiosseletiva da (1E,4E)-1,5-bis(4-metoxifenil)-1,4-pentadien-3-ona (1) mediada por fermento de pão (BY, células de Saccharomyces cerevisiae) em sistema bifásico contendo água e n-hexano. A biotransformação deste composto foi quimiosseletiva, formando apenas a correspondente cetona saturada 1,5-bis(4-metoxifenil
J. Braz. Chem. Soc.. Publicado em: 2013-07
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8. ReaÃÃes biocatalÃticas usando cÃlulas Ãntegras de Lens culinaris (Lentilha). / REACTIONS USING WHOLE CELL BIOCATALYTIC LENS CULINARIS (LENTIL)
This paper describes the use of seeds of lentil (Lens culinaris) as intact plant system in biocatalytic reactions of reduction and hydrolysis. Initially, some plant sources were evaluated for their action in the biocatalytic reduction of aromatic ketone acetophenone. The plants that showed positive results in the reduction reaction underwent determination of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/10/2012
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9. Reduction reactions, hydrolysis and resolution of racemates, using as whole cell biocatalys SESAME SEED (Sesamum indicum L.) / ReaÃÃes de reduÃÃo, hidrÃlise e resoluÃÃo de racematos, usando como biocatalisador cÃlulas Ãntegras de sementes de gergelim Sesamum indicum L
O presente trabalho relata a utilizaÃÃo de sementes de gergelim secas e germinadas como fonte de enzimas em reaÃÃes de reduÃÃo, hidrÃlise e esterificaÃÃo. Uma sÃrie de reaÃÃes de reduÃÃo utilizando como biocatalisador sementes de gergelim quimiotipo negra (SGN) foram realizadas, tendo como substratos: acetofenona e derivados halogenados de acet
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/09/2012
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10. BiorreduÃÃo de cetonas aromÃticas prÃ-quirais empregando Pseudomonas sp. isolada de Nopalea cochenellifera (L.) Salm Dyckâ / Bioreduction of prochiral aromatic ketones using Pseudomonas sp. Nopalea cochenellifera isolated (L.) Salm Dyck "
Neste trabalho descrevemos o estudo do potencial biocatalÃtico de cÃlulas Ãntegras de micro-organismos isolados de um vegetal da famÃlia das Cactaceas, Nopalea cochenillifera (L.) Salm-Dyck, popularmente conhecido como âpalma doceâ ou âpalma forrageiraâ. Os micro-organismos foram isolados pela tÃcnica de induÃÃo utilizando o substrato acetofenona.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/08/2012
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11. Processos biocatalÃticos utilizando a casca da laranja da terra (Citrus aurantium L.) / Biocatalytic processes using the orange peel of the earth (Citrus aurantium L.)
O Brasil à o maior produtor mundial de laranja e de suco de laranja, sendo este setor de grande importÃncia para economia brasileira, responsÃvel por gerar mais de 400 mil empregos e movimentar cifras de bilhÃes de reais por ano. Mas, este setor tambÃm à responsÃvel pela produÃÃo de grande quantidade de rejeitos industriais, que equivalem a 50% do p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/01/2012
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12. Candida tropicalis CE017: a new Brazilian enzymatic source for the bioreduction of aromatic prochiral ketones
A reatividade e estereosseletividade apresentadas por uma nova cepa de Candida tropicalis na redução de cetonas pró-quirais foram comparadas com cepas de microrganismos, estudadas em nosso laboratório, provenientes da biodiversidade brasileira. Neste caso, Candida tropicalis demonstrou-se como um agente redutor versátil e estereosseletivo na biorreduç�
Journal of the Brazilian Chemical Society. Publicado em: 2010