Preparation and Characterization of Chiral Oxazaborolidine Complex Immobilized SBA-15 and Its Application in the Asymmetric Reduction of Prochiral Ketones
Article first published online: 15 JAN 2010
Copyright © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Chemistry – An Asian Journal
Volume 5, Issue 4, pages 897–903, April 1, 2010
How to Cite
Balakrishnan, U., Ananthi, N., Selvan, S. T., Pal, R., Ariga, K., Velmathi, S. and Vinu, A. (2010), Preparation and Characterization of Chiral Oxazaborolidine Complex Immobilized SBA-15 and Its Application in the Asymmetric Reduction of Prochiral Ketones. Chem. Asian J., 5: 897–903. doi: 10.1002/asia.200900412
- Issue published online: 30 MAR 2010
- Article first published online: 15 JAN 2010
- Manuscript Received: 1 SEP 2009
- DST. Grant Number: SR/FTP/CS-142-2006
- Ministry of Education, Culture, Sports, Science and Technology (MEXT)
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- asymmetric catalysis;
- mesoporous materials;
The immobilization of chiral oxazaborolidine complex in the well-ordered 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.