BRUNNER, H and BRANDL, P (1992) ASYMMETRIC CATALYSIS .76. RH-CATALYZED ENANTIOSELECTIVE HYDROSILYLATION OF ACETOPHENONE BY A POLYMER-BOUND PYRIDINEOXAZOLINE. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES, 47 (5). pp. 609-613. ISSN 0932-0776,
Full text not available from this repository.Abstract
In the enantioselective hydrosilylation of acetophenone with diphenylsilane, a polystyrene-bound heterogeneous Rh/pyridineoxazoline catalyst achieved higher optical inductions than a comparable homogeneous catalyst. After using the polymeric catalyst 8-10 times, the catalytic activity decreased markedly and an inversion of the product configuration was observed, the enantiomeric excess rising to 92% ee. These results indicate that the polymeric catalyst contains several catalytically active species with different enantioselectivity and stability.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | COMPLEXES; KETONES; OPTICALLY ACTIVE LIGANDS; POLYSTYRENE-BOUND PYRIDINEOXAZOLINE; ENANTIOSELECTIVE HYDROSILYLATION |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:44 |
| URI: | https://pred.uni-regensburg.de/id/eprint/54566 |
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