Search Results - "Keppler, Artur F"

Solvent-free synthesis of nitrone-containing template as a chemosensor for selective detection of Cu(II) in water by Carneiro, Leonardo M., Bartoloni, Fernando H., Angolini, Célio F.F., Keppler, Artur F.

“…[Display omitted] •Nitrone-based compounds were used to detect metal cations in aqueous solutions.•The chemosensor candidates were isolated in 60 min, in good…”
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Z to E light-activated isomerization of α-pyridyl-N-arylnitrone ligands sensitized by rhenium(I) polypyridyl complexes by Mamud, Julia F., Biazolla, Giovanna, Marques, Caroline S., Cerchiaro, Giselle, de Queiroz, Thiago B., Keppler, Artur F., Polo, André S.

“…[Display omitted] •Rhenium polypyridyl compounds were prepared with α-pyridyl-N-arylnitrone ligands.•Z-E isomerization of the coordinated nitrones was done by…”
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Enzymatic evaluation of different Aspergillus strains by biotransformation of cyclic ketones by Keppler, Artur F., Porto, André L.M., Schoenlein-Crusius, Iracema H., Comasseto, João V., Andrade, Leandro H.

“…The potential of different Aspergillus strains in carrying out the biotransformation of cyclic ketones was investigated. All the strains employed showed…”
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Mechanistic aspects of the isomerization of Z-vinylic tellurides double bonds in the synthesis of potassium Z-vinyltrifluoroborate salts by Stefani, Hélio A, Guadagnin, Rafael C, Keppler, Artur F, Botteselle, Giancarlo V, Comasseto, João V, Suganuma, Carlos A

“…Through direct transmetalation reaction of Z-vinylic tellurides with nBuLi was observed the unexpected isomerization of double bonds leading to potassium…”
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Organic Tellurium-Centered Radicals Evidenced by EPR Spin Trapping and Mass Spectrometry Experiments:  Insights into the Mechanism of the Hydrotelluration Reaction by Keppler, Artur F, Cerchiaro, Giselle, Augusto, Ohara, Miyamoto, Sayuri, Prado, Fernanda, Di Mascio, Paolo, Comasseto, João V

“…The first experimental evidence for the formation of an organic tellurium-centered radical (RTe•, R = Ph or n Bu groups) during the hydrotelluration of alkenes…”
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Evaluation of acetophenone monooxygenase and alcohol dehydrogenase activities in different fungal strains by biotransformation of acetophenone derivatives by Andrade, Leandro H., Keppler, Artur F., Schoenlein-Crusius, Iracema H., Porto, André L.M., Comasseto, João V.

“…Experimental conditions using whole cells to select fungal strains for specific bioreduction of ketones and formation of Baeyer–Villiger oxidation products…”
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(+)-BINOL and Pure Shift Experiment: A Bidirectional Approach for NMR Chiral Discrimination of Overcrowded Spectra of Primary Amines by Merino, Juliana, Keppler, Artur, Silva, Márcio

“…In this work, enantiopure 1,1’-bi-2-naphthol (BINOL) derivatives and carboxylic acids were evaluated as chiral solvating agents (CSAs) in the nuclear magnetic…”
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Lithium butylchalcogenolate induced Michael-aldol tandem sequence: easy and rapid access to highly functionalized organochalcogenides and unsaturated compounds by Keppler, Artur F., Gariani, Rogério A., Lopes, Danilo G., Comasseto, João V.

“…Lithium n butylchalcogenolates are generated in situ by reacting the elements (S, Se, and Te) with n butyllithium at 0 °C. Reaction of the lithium…”
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Chemoselective screening for the reduction of a chiral functionalised (±)-2-(phenylthio)cyclohexanone by whole cells of Brazilian micro-organisms by Piovan, Leandro, Kagohara, Edna, Ricci, Luis C., Keppler, Artur F., Capelari, Marina, Andrade, Leandro H., Comasseto, João V., Porto, André L.M.

“…The use of whole cells of micro-organisms to bring about the biotransformation of an organic compound offers a number of advantages, but problems caused by…”
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Mechanistic study of the addition reaction of TeCl4 to alkynes: Participation of TeCl3 centered-radical by Keppler, Artur F., Prado, Fernanda M., Cerchiaro, Giselle, Mascio, Paolo Di, Comasseto, João V.

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Mechanistic study of the addition reaction of TeCl 4 to alkynes: Participation of TeCl 3 centered-radical by Keppler, Artur F., Prado, Fernanda M., Cerchiaro, Giselle, Mascio, Paolo Di, Comasseto, João V.

“…The mechanism of the addition reaction of TeCl 4 to alkynes was indirectly established by the detection of TeCl 3 centered radicals using EPR spin trapping,…”
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