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.

Task-specific ionic-liquid-catalyzed efficient synthesis of indole derivatives under solvent-free conditions

2010 ◽  
Vol 88 (2) ◽  
pp. 150-154 ◽  
Author(s):  
Sudarshan Das ◽  
Matiur Rahman ◽  
Dhiman Kundu ◽  
Adinath Majee ◽  
Alakananda Hajra
Keyword(s):  
Ionic Liquid ◽  
Room Temperature ◽  
Acid Catalyst ◽  
Significant Loss ◽  
Solvent Free ◽  
Indole Derivatives ◽  
Efficient Synthesis ◽  
Solvent Free Conditions ◽  
High Yields ◽  
Task Specific Ionic Liquid

A sulfonic-acid-functionalized ionic liquid is used as a Brønsted acid catalyst for the efficient synthesis of indole derivatives in good-to-high yields at room temperature under solvent-free conditions. The catalyst can be reused for ten consecutive runs without significant loss of activity.

scholarly journals [DBN][HSO4]-Promoted facile and green synthesis of 2-Amino-4H-pyrans derivatives under microwave irradiation

2021 ◽  
Vol 11 (2-S) ◽  
pp. 89-97
Author(s):  
Vishal Mane ◽  
Dhanjay Mane
Keyword(s):  
Ionic Liquid ◽  
Microwave Irradiation ◽  
Room Temperature ◽  
Knoevenagel Condensation ◽  
Reaction Times ◽  
Environmentally Benign ◽  
Successive Reaction ◽  
Solvent Free Conditions ◽  
High Yields ◽  
First Time

The [DBN][HSO4] -promoted Knoevenagel condensation followed by cyclization protocol has been developed for the first time by a successive reaction of aldehydes, dimedone and malononitrile to afford 2-Amino-4H-pyrans derivatives in high to excellent yields at room temperature. The synergic couple of microwave and ionic liquid provided the capability to allow a variability of functional groups, short reaction times, easy workup, high yields, recyclability of the catalyst, and solvent-free conditions, thus providing economic and environmental advantages. Keywords: [DBN][HSO4], Environmentally benign, 2-Amino-4H-pyrans, Knoevenagel condensation, Microwave irradiation

ChemInform Abstract: Task-Specific Ionic-Liquid-Catalyzed Efficient Synthesis of Indole Derivatives under Solvent-Free Conditions.

ChemInform ◽  
2010 ◽  
Vol 41 (31) ◽  
pp. no-no
Author(s):  
Sudarshan Das ◽  
Matiur Rahman ◽  
Dhiman Kundu ◽  
Adinath Majee ◽  
Alakananda Hajra
Keyword(s):  
Ionic Liquid ◽  
Solvent Free ◽  
Indole Derivatives ◽  
Efficient Synthesis ◽  
Solvent Free Conditions ◽  
Task Specific Ionic Liquid
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