Research Article

An Efficient and Recyclable Ionic Liquid-Supported Proline Catalyzed Knoevenagel Condensation

Table 1

Knoevenagel condensation of malononitrile with aldehydes in the presence of [Promim]CF3COO (IV).

EntryAldehydeYield, %Purity a , %EntryAldehydeYield a , %Purity b , %

1676789.tab.00198999676789.tab.0098599
2676789.tab.0029710010676789.tab.0108098
3676789.tab.003809911676789.tab.0119798
4676789.tab.004929912676789.tab.0128599
5676789.tab.005809913676789.tab.0139599
6676789.tab.006869814676789.tab.0148098
7676789.tab.007969915676789.tab.0156598
8676789.tab.0089799

Reaction conditions: aldehydes: 1 mmol; malononitrile: 1.1 mmol; [Promim]CF3COO (IV): 30 mol %; 80°C, 24 h. a : Isolated yield. b : purity of the product was determined by HPLC.