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Multipurpose box- and azabox-Based Immobilized Chiral Catalysts
Fraile, José M.
, Pérez, Ignacio, Mayoral, José A. und Reiser, Oliver
(2006)
Multipurpose box- and azabox-Based Immobilized Chiral Catalysts.
Advanced Synthesis & Catalysis 348 (12-13), S. 1680-1688.
Veröffentlichungsdatum dieses Volltextes: 05 Aug 2009 13:40
Artikel
DOI zum Zitieren dieses Dokuments: 10.5283/epub.2528
Zusammenfassung
Azabis(oxazolines) can be used as chiral ligands in the copper-catalyzed enantioselective Mukaiyama aldol reaction. When supported on solids, azabis(oxazoline)-copper complexes are more easily deactivated than their analogous bis(oxazoline)copper complexes, and are not compatible with the use of coordinating solvents in the method of preparation. The performance of the immobilized catalysts (up ...
Azabis(oxazolines) can be used as chiral ligands in the copper-catalyzed enantioselective Mukaiyama aldol reaction. When supported on solids, azabis(oxazoline)-copper complexes are more easily deactivated than their analogous bis(oxazoline)copper complexes, and are not compatible with the use of coordinating solvents in the method of preparation. The performance of the immobilized catalysts (up to 86 % ee) depends on the support and the reaction solvent, with some positive effect on enantioselectivity due to surface effects. The deactivation is not irreversible and the deactivated catalysts show excellent performance in the cyclopropanation reaction, providing added value to the supported multipurpose catalysts.
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| Dokumentenart | Artikel | ||||
| Titel eines Journals oder einer Zeitschrift | Advanced Synthesis & Catalysis | ||||
| Verlag: | WILEY-V C H VERLAG GMBH | ||||
|---|---|---|---|---|---|
| Ort der Veröffentlichung: | WEINHEIM | ||||
| Band: | 348 | ||||
| Nummer des Zeitschriftenheftes oder des Kapitels: | 12-13 | ||||
| Seitenbereich: | S. 1680-1688 | ||||
| Datum | August 2006 | ||||
| Institutionen | Chemie und Pharmazie > Institut für Organische Chemie > Lehrstuhl Prof. Dr. Oliver Reiser | ||||
| Identifikationsnummer |
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| Stichwörter / Keywords | ENANTIOSELECTIVE ALDOL ADDITIONS; SUPPORTED BIS(OXAZOLINE)-COPPER COMPLEXES; C(2)-SYMMETRIC COPPER(II) COMPLEXES; POLYMER-BOUND BIS(OXAZOLINE); OXAZOLINE-CONTAINING LIGANDS; DIELS-ALDER REACTIONS; CYCLOPROPANATION REACTIONS; ASYMMETRIC HYDROGENATION; ELECTROSTATIC INTERACTIONS; LEWIS-ACIDS; asymmetric catalysis; azabis(oxazolines); cyclopropanation; Mukaiyama aldol; supported catalysts | ||||
| Dewey-Dezimal-Klassifikation | 500 Naturwissenschaften und Mathematik > 540 Chemie | ||||
| Status | Veröffentlicht | ||||
| Begutachtet | Ja, diese Version wurde begutachtet | ||||
| An der Universität Regensburg entstanden | Unbekannt / Keine Angabe | ||||
| Dokumenten-ID | 2528 |
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