Ionic Liquid as Catalyst and Reaction Medium — A Simple, Efficient and Green Procedure for Knoevenagel Condensation of Aliphatic and Aromatic Carbonyl Compounds Using a Task-Specific Basic Ionic Liquid.

ChemInform ◽  
2006 ◽  
Vol 37 (49) ◽  
Author(s):  
Brindaban C. Ranu ◽  
Ranjan Jana
Keyword(s):  
Ionic Liquid ◽  
Carbonyl Compounds ◽  
Knoevenagel Condensation ◽  
Reaction Medium ◽  
Basic Ionic Liquid ◽  
Green Procedure ◽  
Aromatic Carbonyl Compounds

A solvent-free protocol for the green synthesis of arylalkylidene rhodanines in a task-specific ionic liquid

2010 ◽  
Vol 88 (6) ◽  
pp. 514-518 ◽  
Author(s):  
Abdolhamid Alizadeh ◽  
Mohammad M. Khodaei ◽  
Ali Eshghi
Keyword(s):  
Ionic Liquid ◽  
Green Synthesis ◽  
Carbonyl Compounds ◽  
Catalytic Effect ◽  
Knoevenagel Condensation ◽  
Solvent Free ◽  
Detailed Mechanism ◽  
Solvent Free Conditions ◽  
First Time ◽  
Task Specific Ionic Liquid

2-Hydroxyethylammonium formate acts as a task-specific ionic liquid (TSIL) for the Knoevenagel condensation of carbonyl compounds with rhodanine to afford arylalkylidene rhodanines under solvent-free conditions and in good-to-excellent yields. Additionally, compared with those in organic solvents, the yields obtained in the presence of our ionic liquid (IL) were significantly increased. The detailed mechanism of the catalytic effect of TSIL is also reported for the first time.

Coumarin Synthesis via Knoevenagel Condensation in Moisture Stable Room Temperature Ionic Liquids

2003 ◽  
Vol 2003 (5) ◽  
pp. 294-295 ◽  
Author(s):  
Weiliang Bao ◽  
Zhiming Wang ◽  
Yuxia Li
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Room Temperature ◽  
Knoevenagel Condensation ◽  
Reaction Medium ◽  
Room Temperature Ionic Liquid ◽  
Room Temperature Ionic Liquids ◽  
Structure System ◽  
Coumarin Synthesis

Several coumarins have been synthesised by Knoevenagel condensation in the piperidine/HOAc/moisture stable room temperature ionic liquid ([Emim]+BF4- referring to structure) system at room temperature; the yield of the reaction is good and the reaction medium can be recycled.

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