Abstract
A series of protected beta(2)-dehydroamino acids has been prepared in three steps from commercially available starting materials in good yields. These were used as substrates in rhodium-catalyzed asymmetric hydrogenation applying a mixed ligand system of monodentate phosphoramidites and phosphines. Optimization of the catalyst structure was achieved by high throughput experimentation. High enantioselectivities were obtained ( up to 91%) with full conversion for a number of beta-amino acids.
Original language | English |
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Pages (from-to) | 267-275 |
Number of pages | 9 |
Journal | Organic & Biomolecular Chemistry |
Volume | 5 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2007 |
Keywords
- MONODENTATE P-LIGANDS
- BETA-AMINO ACIDS
- TRANSITION-METAL CATALYSIS
- ASYMMETRIC HYDROGENATION
- COMBINATORIAL APPROACH
- OLEFIN-HYDROGENATION
- PHOSPHORAMIDITE LIGANDS
- STEREOSELECTIVE-SYNTHESIS
- ABSOLUTE-CONFIGURATION
- PHOSPHORUS LIGANDS