Abstract
Chiral calixarene-based diphosphite ligands 3a-d have been obtained via lower-rim functionalisation of the p-tert-butylcalix[4]arene core. High enantiomeric excesses (up to 94 %) and good activities were obtained in the rhodium-catalyzed asymmetric hydrogenation of prochiral olefins with TADDOL-containing diphosphites 3c,d. This is the first example of chiral calix[4]arene-modified ligands that induce high enantioselectivity in metal-catalysed asymmetric reactions.
| Original language | English |
|---|---|
| Pages (from-to) | 4587-4591 |
| Number of pages | 5 |
| Journal | European Journal of Inorganic Chemistry |
| DOIs | |
| Publication status | Published - Oct 2007 |
Keywords
- homogeneous catalysis
- stereoselective catalysis
- asymmetric hydrogenation
- calixarenes
- diphosphites
- RHODIUM-CATALYZED HYDROFORMYLATION
- ENANTIOSELECTIVE CATALYSIS
- PHOSPHORUS LIGANDS
- NBD PRECATALYSTS
- COMPLEXES
- PHOSPHITES
- 1-OCTENE
- TADDOL
- COD
- REGIOSELECTIVITY
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