Efficient acylation and sulfation of carbohydrates using sulfamic acid, a mild, eco-friendly catalyst under organic solvent-free conditions

2011 ◽  
Vol 13 (5) ◽  
pp. 1345 ◽  
Author(s):  
Abhishek Santra ◽  
Goutam Guchhait ◽  
Anup Kumar Misra
Keyword(s):  
Organic Solvent ◽  
Sulfamic Acid ◽  
Solvent Free ◽  
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.

scholarly journals Green synthesis of new lawsone enaminones and their Z/E(CC)-isomerization induced by organic solvent

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12990-12994
Author(s):  
Abolfazl Olyaei ◽  
Amir Mohamadi ◽  
Nilufar Rahmani
Keyword(s):  
Organic Solvent ◽  
Green Synthesis ◽  
Aromatic Amines ◽  
Solvent Free ◽  
Triethyl Orthoformate ◽  
Guanidinium Chloride ◽  
New Class ◽  
Solvent Free Conditions

The synthesis of a new class of lawsone enaminone derivatives by using lawsone, triethyl orthoformate and aromatic amines in the presence of guanidinium chloride under solvent-free conditions has been developed.

ChemInform Abstract: Facile One-Pot Synthesis of Polysubstituted Quinolines under Solvent-Free Conditions Using Sulfamic Acid as a Reusable Catalyst.

ChemInform ◽  
2012 ◽  
Vol 43 (24) ◽  
pp. no-no
Author(s):  
Min Zhang ◽  
Biao Xiong ◽  
Wei Yang ◽  
D. N. T. Kumar ◽  
Yu-Qiang Ding
Keyword(s):  
Sulfamic Acid ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
One Pot ◽  
One Pot Synthesis ◽  
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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