Preparation and characterization of a novel DABCO based tetra cationic ionic liquid as a reusable catalyst for the multi-component synthesis of 2H-indazolo[2,1-b]phthalazine-trione and [1,2,4]triazoloquinazolinone derivatives under solvent-free condition

2020 ◽  
Vol 1201 ◽  
pp. 127143 ◽  
Author(s):  
Niloufar Safari ◽  
Farhad Shirini ◽  
Hassan Tajik
Keyword(s):  
Ionic Liquid ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Free Condition ◽  
Solvent Free Condition

scholarly journals Synthesis and Characterization of Functionalize HY Zeolite With Sulfunic Acid, A Micro-meso Structure as an Efficient Reusable Catalyst in Organic Transformations

2021 ◽  
Author(s):  
Mojgan Zendehdel ◽  
Fatemeh Tavakoli
Keyword(s):  
Reaction Times ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Organic Transformations ◽  
Hy Zeolite ◽  
New Class ◽  
Solvent Free Condition ◽  
Result Show ◽  
High Yields

Abstract A new class of catalyst has been prepared with sulfunic acid functionalized HY zeolite (HY-N-SO3H) and characterized by FESEM, TEM, FTIR, TGA, XRD and BET. The result show that the catalyst has the micro-meso structure without ordering in the mesophase. Then, two sets of organic reaction were examined to consider of catalytic activity. The micro-meso structure HY-N-SO3H was used as an acidic catalyst to synthesis of coumarins via Pechmann reaction and facile transformation of amines to formamides under solvent free condition. This catalyst was compared with NaY-N-SO3H and MCM-N-SO3H and pure porous material to consider of the effect of acidity and kind and size of porous in the catalyst. The significant advantages of HY-N-SO3H respect to other catalyst are short reaction times, high yields, pure products, mild conditions and easy workup. In addition, we report an original and environmentally friendly solvent-free procedures which reusability of catalyst makes this method nearly green and environmental friendly.

scholarly journals Nanosphere of Semicrystalline Polyaniline Powder: An Effective, Versatile, and Reusable Catalyst for Hantzsch Reaction

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Ravi Bolagam ◽  
Rajender Boddula ◽  
Palaniappan Srinivasan
Keyword(s):  
Interfacial Polymerization ◽  
Acid Group ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Powder Form ◽  
Hantzsch Reaction ◽  
Diphosphonic Acid ◽  
Free Condition ◽  
Solvent Free Condition ◽  
Acid Catalyzed

Polyaniline salt containing 1-hydroxyethane-1,1-diphosphonic acid with nanosphere morphology in semicrystalline powder form was successfully synthesized by interfacial polymerization pathway and demonstrated as polymer based acid catalyzed in the synthesis of 1,4-dihydropyridines and polyhydroquinoline derivatives. This catalyst promotes the reaction under solvent free condition in excellent yield in 10 min with recyclability. The advantages of this methodology are the easy synthesis of polymer containing acid group catalyst in powder form having easily handlable, efficient, versatile, and reusable nature.

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