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. 2010 Apr 1;5(4):897-903.
doi: 10.1002/asia.200900412.

Preparation and characterization of chiral oxazaborolidine complex immobilized SBA-15 and its application in the asymmetric reduction of prochiral ketones

Umesh Balakrishnan  1 , Nallamuthu Ananthi, Sakthivel Tamil Selvan, Ravindra Pal, Katsuhiko Ariga, Sivan Velmathi, Ajayan Vinu
Affiliations

Preparation and characterization of chiral oxazaborolidine complex immobilized SBA-15 and its application in the asymmetric reduction of prochiral ketones

Umesh Balakrishnan et al. Chem Asian J. .

Abstract

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.

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