Task-Specific Ionic Liquid Functionalized–MIL–101(Cr) as a Heterogeneous and Efficient Catalyst for the Cycloaddition of CO2 with Epoxides Under Solvent Free Conditions

2019 ◽  
Vol 7 (4) ◽  
pp. 3962-3973 ◽  
Author(s):  
Mehrnaz Bahadori ◽  
Shahram Tangestaninejad ◽  
Marko Bertmer ◽  
Majid Moghadam ◽  
Valiollah Mirkhani ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solvent Free ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
Task Specific Ionic Liquid

Preparation and Characterization of a Novel Room Temperature Dicationic Ionic Liquid and its Application in the Synthesis of Xanthenediones Under Solvent-Free Conditions

2018 ◽  
Vol 21 (8) ◽  
pp. 602-608 ◽  
Author(s):  
Zainab Ehsani-Nasab ◽  
Ali Ezabadi
Keyword(s):  
Ionic Liquid ◽  
Room Temperature ◽  
Reaction Times ◽  
Significant Loss ◽  
Solvent Free ◽  
Acidity Function ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
Hammett Acidity Function ◽  
Dicationic Ionic Liquid

Aim and Objective: In the present work, 1, 1’-sulfinyldiethylammonium bis (hydrogen sulfate) as a novel room temperature dicationic ionic liquid was synthesized and used as a catalyst for xanthenediones synthesis. Material and Method: The dicationic ionic liquid has been synthesized using ethylamine and thionyl chloride as precursors. Then, by the reaction of [(EtNH2)2SO]Cl2 with H2SO4, [(EtNH2)2SO][HSO4]2 was prepared and after that, it was characterized by FT-IR, 1H NMR, 13C NMR as well as Hammett acidity function. This dicationic ionic liquid was used as a catalyst for the synthesis of xanthenediones via condensation of structurally diverse aldehydes and dimedone under solvent-free conditions. The progress of the reaction was monitored by thin layer chromatography (ethyl acetate/n-hexane = 3/7). Results: An efficient solvent-free method for the synthesis of xanthenediones has been developed in the presence of [(EtNH2)2SO][HSO4]2 as a powerful catalyst with high to excellent yields, and short reaction times. Additionally, recycling studies have demonstrated that the dicationic ionic liquid can be readily recovered and reused at least four times without significant loss of its catalytic activity. Conclusion: This new dicationic ionic liquid can act as a highly efficient catalyst for xanthenediones synthesis under solvent-free conditions.

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.

scholarly journals Synthesis of 2-aryl substituted 2,3-dihydroquinazoline-4(1H)-ones under solvent free conditions using ionic liquid as a mild and efficient catalyst

2014 ◽  
Vol 5 (4) ◽  
pp. 671-675 ◽  
Author(s):  
Obaiah Obaiah ◽  
Nandeesh Nagalingaiah Kebbahalli ◽  
Raghavendra Manchigaiah Goravanahalli ◽  
Pavankumar Siddalingaiah Chottanahalli ◽  
Rangappa Subbegowda Kanchugarakoppal ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solvent Free ◽  
Efficient Catalyst ◽  
Solvent Free Conditions

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.

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