Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
51904 | Catalysis Communications | 2008 | 4 Pages |
Abstract
A task-specific ionic liquid, [H3N+–CH2–CH2–OH][CH3COO−] was synthesized and used as catalyst in the Knoevenagel condensation reaction of various kinds of aromatic aldehydes with ethyl cyanoacetate or malononitrile. α,β-Unsaturated carbonyl compounds were obtained in reasonable yields when the [H3N+–CH2–CH2–OH][CH3COO−] catalyzed Knoevenagel reaction was carried out at room temperature for several to 60 min under solvent-free conditions. Only E-isomers were detected. The task-specific ionic liquid after removed water could be recycled and reused for five times without noticeably decreasing the catalytic activity. The mechanism of the [H3N+–CH2–CH2–OH][CH3COO−] catalyzed Knoevenagel reaction was discussed.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Caibo Yue, Aiqin Mao, Yunyang Wei, Minjie Lü,