Brunner, Henri and Janura, M. and Stefaniak, S. (1998) Enantioselective catalysis; 123: Octaaldehyde type chelating ligands - A divergent synthesis approach to easily tunable expanded ligands for enantioselective catalysis. SYNTHESIS-STUTTGART (12). pp. 1742-1749. ISSN 0039-7881, 1437-210X
Full text not available from this repository.Abstract
A broad range of optically active two-layer phosphanes was obtained by a divergent reaction sequence. Chirality was introduced into the ligands in the last step by easily performed Schiff base condensation of primary amines from the "chiral pool" and achiral octaaldehydes containing a bisphosphane core. The two achiral precursors are 1,2-ethylene- and o-phenylene-bridged bisphosphanes with four 3,5-dicarbaldehyde-substituted phenyls, synthesized in six steps. The resulting octaimine ligands have been used in Rh, Pd and Ni complexes in several model reactions of enantioselective catalysis giving low optical inductions.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ASYMMETRIC CATALYSIS; CONVENIENT SYNTHESIS; CHIRAL DIPHOSPHINE; HYDROGENATION; COMPLEXES; RHODIUM(I); NORPHOS; ACID; two layer bisphosphanes; dendritic Schiff base ligands; divergent synthesis; enantioselective catalysis |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Alumni or Retired Professors > Prof. Dr. Henri Brunner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 09 Feb 2023 08:05 |
| Last Modified: | 09 Feb 2023 08:05 |
| URI: | https://pred.uni-regensburg.de/id/eprint/49326 |
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