Journal
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
Volume 2010, Issue 19, Pages 3672-3677Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.201000304
Keywords
Asymmetric synthesis; Ionic liquids; Organocatalysis; Aldol reactions; Chirality
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Funding
- National Natural Science Foundation of China [2010CB833300]
- Research Fund for the Doctoral Program of Higher Education, China [20090031110019]
- Nankai University State Key Laboratory of Elemento-Organic Chemistry
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A chiral anion modified ionic liquid derived from L-proline proves as a green and efficient asymmetric organocatalyst for direct asymmetric aldol reactions in [BMIm]BF4 at room temperature. The corresponding aldol products with moderate to good isolated yields (up to 99%), anti-diastereoselectivities (up to 97:3), and excellent enantioselectivities (up to 99% ee) were afforded. Recycling of the catalyst and solvent ([BMIm]BF4) was possible up to four runs with a slight reduction in activity.
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