Paper
Catalysis Science & Technology
occurs parallel with the racemic hydrogenation and sub-
sequent kinetic resolution to (S)-DHIP, the major chiral prod-
uct at 100% conversion. This leads to the overall conclusion
that higher than 50% yields for the (S)-DHIP in this catalyst–
modifier system is likely not possible; however, immobilized
proline containing Pd catalysts appear promising in yielding
enantiomeric product in a true chiral catalytic fashion.
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8 S. C. Mhadgut, M. Török, J. Esquibel and B. Török, J. Catal.,
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9 S. C. Mhadgut, M. Török, S. Dasgupta and B. Török, Catal. Lett.,
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10 É. Sipos, A. Tungler and I. Bitter, New chiral modifier for
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Acknowledgements
The financial support provided by the University of Massachusetts
Boston, Michigan Technological University and the ACS Petroleum
Research Fund is highly appreciated.
11 B. Török, A. Kulkarni, R. DeSousa, K. Satuluri, M. Török and
G. K. S. Prakash, Catal. Lett., 2011, 141, 1435.
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