Synthesis, characterization, and catalytic activity of ionic liquids based on biosources

New room-temperature ionic liquids were synthesized from natural and easily available feedstocks (choline hydroxide and amino acids) following an economical and green route in which the only by-product was water. They were successfully applied as catalysts for the Knoevenagel test reaction between b...

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Bibliographic Details
Published inTetrahedron letters Vol. 51; no. 37; pp. 4877 - 4881
Main Authors Moriel, P., García-Suárez, E.J., Martínez, M., García, A.B., Montes-Morán, M.A., Calvino-Casilda, V., Bañares, M.A.
Format Journal Article
LanguageEnglish
Published OXFORD Elsevier Ltd 15.09.2010
Elsevier
Subjects
Biosources
Catalysis
Chemistry
Chemistry, Organic
Green process
Ionic liquids
Knoevenagel condensation
Physical Sciences
Science & Technology
Ionic liquids
Green process
Catalysis
Knoevenagel condensation
Biosources
DESIGN
AMINO
CARBONS
KNOEVENAGEL CONDENSATION REACTION
GREEN
BENZALDEHYDE
SOLVENTS
MOLTEN-SALTS
GLUCOSE
EFFICIENT
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Summary:New room-temperature ionic liquids were synthesized from natural and easily available feedstocks (choline hydroxide and amino acids) following an economical and green route in which the only by-product was water. They were successfully applied as catalysts for the Knoevenagel test reaction between benzaldehyde and different active methylene compounds, at room temperature and under solvent-free conditions, to produce α,β-unsaturated carbonyl compounds, exhibiting good conversions and high selectivities. The catalytic role of cholinium and aminoacetate ions in the Knoevenagel condensation is discussed.
ISSN:0040-4039
1873-3581
DOI:10.1016/j.tetlet.2010.07.060