Title:[Bmim][CF3COO] as a Solvent and a Catalyst for the Knoevenagel
Condensation
Volume: 21
Issue: 10
Author(s): Nguyen Thi Chung, Vo Cong Dung and Dau Xuan Duc*
Affiliation:
- Department Chemistry, School of Education, Vinh University, Vinh City, Vietnam
Keywords:
Ionic liquid, methylene compounds, ethyl cyanoacetate, malonitrile, diethyl malonate, benzaldehyde.
Abstract: A facile and green strategy for the Knoevenagel condensation reaction of aryl aldehydes
and active methylene compounds using [Bmim][CF3COO] ionic liquid as a solvent and a catalyst has
been introduced. The method features some advantages such as good to excellent yield of products,
relatively short reaction time, mild reaction conditions, broad substrate scope, and scalability. Moreover,
the ionic liquid solvent could be conveniently recycled and reused up to three times without
any considerable loss of catalytic activity. Twelve products were obtained in high yields, and their
structures were confirmed by NMR data. A plausible reaction mechanism involving the role of the
ionic liquid catalyst was also suggested.