Bio-nanohybrid catalysts based on L-leucine immobilized in hydrotalcite and their activity in aldol reaction
| Autor: | Jesús E. Sueiras, Dana-Georgiana Crivoi, Ronald-Alexander Miranda, Jordi Llorca, Anna M. Segarra, Elisabetta Finocchio, Francisco Medina, Gianguido Ramis |
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| Přispěvatelé: | Catàlisi heterogènia, Enginyeria Química, Universitat Rovira i Virgili, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
L-Leucine
Layered double hydroxides Intercalation (chemistry) Catalitzadors Cyclohexanone Hydrotalcite engineering.material 010402 general chemistry 01 natural sciences Catalysis chemistry.chemical_compound Immobilization Chemical engineering Aldol reaction Catàlisi Coprecipitation Asymmetric catalysis Intercalation Organic chemistry Nanotechnology Spectroscopy Montmorillonite 0926-860X Catalysts 010405 organic chemistry Chemistry Nanotecnologia Process Chemistry and Technology Enantioselective synthesis Nanohybrid materials Water Precursors Ingeniería química 0104 chemical sciences Solvent l-Leucine engineering Chemistry Physical and theorical Clays Materials nanoestructurats Reconstruction Amino-acids Enginyeria química Enginyeria química::Química física [Àrees temàtiques de la UPC] Fisicoquímica |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Applied Catalysis A-General Recercat. Dipósit de la Recerca de Catalunya instname |
| DOI: | 10.1016/j.apcata.2016.03.018 |
| Popis: | Nanohybrid materials based on L-leucine (L-Leu) and hydrotalcites (HT) were prepared by the ion exchange and reconstruction method, under mild synthesis conditions. The location, amount and the form of the immobilized L-Leu are affected not only by the time of synthesis, but also by temperature and ultrasound treatment. The XRD results demonstrate that the immobilization occurs in either a vertical or oblique orientation with respect to the HT layers. The catalytic activity of these materials was tested in the aldol addition reaction of cyclohexanone with different aromatic aldehydes, affording mainly the syndiastereomer.. Furthermore, the present study demonstrates that both diastereo- and enantioselectivity can be easily modulated by the appropriate combination of nanohybrid catalyst, solvent and reaction time. (C) 2016 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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