Asymmetric reduction of aromatic ketimines in the presence of helical polymer as catalyst |
| |
| Authors: | Kayo Terada Toshio Masuda Fumio Sanda |
| |
| Institution: | 1. Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura Campus, Nishikyo‐ku, Kyoto 615‐8510, Japan;2. Department of Environmental and Biotechnological Chemistry, Faculty of Engineering, Fukui University of Technology, 3‐6‐1 Gakuen, Fukui 910‐8505, Japan |
| |
| Abstract: | Novel optically active ethynyl monomers were synthesized from L ‐valine and N‐methyl‐L ‐valine, and polymerized with a rhodium catalyst to provide the polymers with number‐average molecular weights over 200,000 in good yields. The CD and UV‐vis spectra of the polymers indicated that they took helical structures with predominantly one‐handed screw sense in solution. The polymers served as catalysts of asymmetric reduction of aromatic ketimines to afford optically active amines in moderate yields. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 4971–4981, 2009 |
| |
| Keywords: | catalysis chiral polyacetylenes |
|
|
