Sulfamic acid: An efficient and green catalyst for synthesis of 1,5-benzodiazepines under solvent-free conditions

2007 ◽  
Vol 18 (4) ◽  
pp. 354-358 ◽  
Author(s):  
Min Xia ◽  
Yue-dong Lu
Keyword(s):  
Sulfamic Acid ◽  
Solvent Free ◽  
Green Catalyst ◽  
Solvent Free Conditions

scholarly journals Sulfamic acid pyromellitic diamide-functionalized MCM-41 as a multifunctional hybrid catalyst for melting-assisted solvent-free synthesis of bioactive 3,4-dihydropyrimidin-2-(1H)-ones

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ehsan Valiey ◽  
Mohammad G. Dekamin ◽  
Zahra Alirezvani
Keyword(s):  
Structural Characteristics ◽  
Biginelli Reaction ◽  
High Surface ◽  
High Surface Area ◽  
Sulfamic Acid ◽  
Solvent Free ◽  
Biologically Active ◽  
Green Protocol ◽  
Solvent Free Conditions ◽  
Mcm 41

AbstractThis study introduces a practical approach to fabricate a novel hybrid acidic catalyst, namely sulfamic acid pyromellitic diamide-functionalized MCM-41 (MCM-41-APS-PMDA-NHSO3H). Various techniques such as FTIR, TGA, XRD, BET, FESEM, and EDX were used to confirm its structural characteristics. The efficiency of the new MCM-41-APS-PMDA-NHSO3H organosilica nanomaterials, as a heterogenous nanocatalyst, was examined in the synthesis of biologically active 3,4-dihydropyrimidin-2-(1H)-one derivatives under solvent-free conditions. It was found that the nanoporous MCM-41-APS-PMDA-NHSO3H, demonstrating acidic nature and high surface area, can activate all the Biginelli reaction components to afford desired 3,4-dihydropyrimidin-2-(1H)-ones under solvent-free conditions in short reaction time. Furthermore, easy and quick isolation of the new introduced hybrid organosilica from the reaction mixture as well as its reusability with negligible loss of activity in at least five consecutive runs are another advantages of this green protocol.

Synthesis of 1,2,4,5-tetrasubstituted imidazoles using 2,6-dimethylpyridinium trinitromethanide {[2,6-DMPyH]C(NO2)3} as a novel nanostructured molten salt and green catalyst

RSC Advances ◽  
2015 ◽  
Vol 5 (42) ◽  
pp. 32933-32940 ◽  
Author(s):  
Mohammad Ali Zolfigol ◽  
Saeed Baghery ◽  
Ahmad Reza Moosavi-Zare ◽  
Seyed Mohammad Vahdat
Keyword(s):  
Molten Salt ◽  
Solvent Free ◽  
Green Catalyst ◽  
Solvent Free Conditions ◽  
Tetrasubstituted Imidazoles

2,6-Dimethylpyridinium trinitromethanide {[2,6-DMPyH]C(NO2)3} as a novel nanostructured molten salt catalyst (MS) was synthesized, characterized and used for the synthesis of 1,2,4,5-tetrasubstituted imidazoles under solvent-free conditions.

Preparation of polydopamine sulfamic acid-functionalized magnetic Fe3O4 nanoparticles with a core/shell nanostructure as heterogeneous and recyclable nanocatalysts for the acetylation of alcohols, phenols, amines and thiols under solvent-free conditions

2016 ◽  
Vol 18 (23) ◽  
pp. 6337-6348 ◽  
Author(s):  
Hojat Veisi ◽  
Sepideh Taheri ◽  
Saba Hemmati
Keyword(s):  
Fe3o4 Nanoparticles ◽  
Sulfonic Acid ◽  
Sulfamic Acid ◽  
Solvent Free ◽  
Core Shell ◽  
Solvent Free Conditions ◽  
Magnetic Fe3o4 Nanoparticles ◽  
Sulfonic Acid Groups ◽  
Magnetic Fe3o4

The loading of sulfonic acid groups on the surface of PDA-encapsulated Fe3O4 nanoparticles is proposed to fabricate a core–shell Fe3O4@PDA-SO3H nanocatalyst.

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