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Preparation and Characterization of Chiral Oxazaborolidine Complex Immobilized SBA‐15 and Its Application in the Asymmetric Reduction of Prochiral Ketones
Author(s) -
Balakrishnan Umesh,
Ananthi Nallamuthu,
Selvan Sakthivel Tamil,
Pal Ravindra,
Ariga Katsuhiko,
Velmathi Sivan,
Vinu Ajayan
Publication year - 2010
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.200900412
Subject(s) - catalysis , homogeneous , enantioselective synthesis , adsorption , fourier transform infrared spectroscopy , chemistry , diffuse reflectance infrared fourier transform , combinatorial chemistry , selective catalytic reduction , organic chemistry , chemical engineering , photocatalysis , mathematics , combinatorics , engineering
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.