scholarly journals Solvent-Free Synthesis of 1,2,4,5-Tetrasubstituted Imidazoles Using Nano Fe3O4@SiO2-OSO3H as a Stable and Magnetically Recyclable Heterogeneous Catalyst

2015 ◽  
Vol 31 (1) ◽  
pp. 573-579 ◽  
Author(s):  
Sepideh Yadegarian ◽  
Abolghasem Davoodnia ◽  
Ahmad Nakhaei
Keyword(s):  
Heterogeneous Catalyst ◽  
Solvent Free ◽  
Nano Fe3o4 ◽  
Recyclable Heterogeneous Catalyst ◽  
Solvent Free Synthesis ◽  
Tetrasubstituted Imidazoles

Niobic Acid as a Recyclable Heterogeneous Catalyst for the Solvent-Free Synthesis of Substituted Benzimidazoles

2013 ◽  
Vol 1 (2) ◽  
pp. 136-144 ◽  
Author(s):  
Beatriz Vieira ◽  
Angelita Barcellos ◽  
Ricardo Schumacher ◽  
Eder Lenardao ◽  
Diego Alves
Keyword(s):  
Heterogeneous Catalyst ◽  
Solvent Free ◽  
Niobic Acid ◽  
Recyclable Heterogeneous Catalyst ◽  
Solvent Free Synthesis

scholarly journals Poly(N-‎vinylimidazole): A ‎biocompatible‎, efficient, and ‎highly ‎‎recyclable ‎heterogeneous ‎catalyst for ‎the ‎preparation of ‎bis(3-‎‎indolyl)methanes ‎

2021 ◽  
Vol 1 (1) ◽  
pp. 15-25
Author(s):  
Hayedeh Gorjian ◽  
Hoda Fahim ◽  
Nader Ghaffari Khaligh
Keyword(s):  
Heterogeneous Catalyst ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Mild Conditions ◽  
Recyclable Heterogeneous Catalyst ◽  
Halogen Free ◽  
Solvent Free Synthesis

Poly(N-vinylimidazole) (PVIm), as a biocompatible, efficient, halogen-free, and reusable catalyst, was ‎applied for the solvent-free synthesis of a library of bis(3-indolyl)methanes. The reaction was ‎smoothly carried out under mild conditions, and the crude products were purified easily, and ‎the pure products were obtained in high to excellent yields.‎

H-β-zeolite catalyzed transamidation of carboxamides, phthalimide, formamides and thioamides with amines under neat conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (115) ◽  
pp. 95313-95317 ◽  
Author(s):  
Sadu Nageswara Rao ◽  
Darapaneni Chandra Mohan ◽  
Subbarayappa Adimurthy
Keyword(s):  
Heterogeneous Catalyst ◽  
Solvent Free ◽  
Β Zeolite ◽  
Solvent Free Conditions ◽  
Recyclable Heterogeneous Catalyst

Efficient transamidation of unactivated carboxamides, phthalimides, formamides and thioamides with amines under solvent-free conditions using H-β-zeolite as a green and recyclable heterogeneous catalyst is described.

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