Preparation and characterization of chiral oxazaborolidine complex immobilized SBA-15 and its application in the asymmetric reduction of prochiral ketones
| Autor: | Ajayan Vinu, Sivan Velmathi, Nallamuthu Ananthi, Ravindra R. Pal, Katsuhiko Ariga, S. T. Selvan, Umesh Balakrishnan |
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| Přispěvatelé: | Balakrishnan, Umesh, Ananthi, Nallamuthu, Selvan, Sakthivel Tamil, Pal, Ravindra, Ariga, Katsuhiko, Velmathi, Sivan, Vinu, Ajayan |
| Rok vydání: | 2010 |
| Předmět: |
ketones
Diffuse reflectance infrared fourier transform reduction Homogeneous catalysis Nitrogen adsorption mesoporous materials Heterogeneous catalysis Biochemistry Catalysis silicates Organic chemistry Fourier transform infrared spectroscopy Boranes Propylamines Chemistry Organic Chemistry Enantioselective synthesis asymmetric catalysis Stereoisomerism General Chemistry Ketones Silanes Silicon Dioxide Characterization (materials science) Oxidation-Reduction |
| Zdroj: | Chemistry, an Asian journal. 5(4) |
| ISSN: | 1861-471X |
| Popis: | The immobilization of chiral oxazaborolidine complex in the wellordered mesochannels of SBA-15 is demonstrated by a postsynthetic approach using 3-aminopropyltriethoxysilane as a reactive surface modifier. The immobilized catalysts are characterized by various techniques, such as XRD, nitrogen adsorption, HRSEM, UV/Vis diffuse reflectance spectroscopy, and FTIR spectroscopy. The catalysts are used for the enantioselective reduction of aromatic prochiral ketones. The activity of the chiral oxazaborolidine complex immobilized SBA-15 catalysts is also compared with that of the pure chiral oxazaborolidine complex, which is a homogeneous catalyst. It is found that the activity of the chiral complex immobilized SBA-15 heterogeneous catalyst is comparable with that of the homogeneous catalyst. Refereed/Peer-reviewed |
| Databáze: | OpenAIRE |
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