2007•Chemistry worldRequires access
Knoevenagel Condensation of Aromatic Aldehydes with Malononitrile in Room Temperature Ionic Liquids
Xinhui Wang
Open publisher page 0 citations
Abstract
The room temperature ionic liquids 1-butyl-3-methylimidazolium bromide and 1-butyl-3-methyllimidazolium hexafluorophosphate were synthesized. They were used as reaction medium. The Knoevenagel condensation reaction rate of aromatic aldehydes and malononitrile can be dramatically enhanced under microwave irradiation, ultrasound irradiation, grinding and stirring. The reaction time can be shortened, and the yiele was generally about 90% sometimes it was up to 98%.