Sulfamic acid-catalyzed synthesis of 13-aryl-indeno[1,2-b]-naphtha[1,2-e]pyran-12(13H)-ones under solvent-free conditions

2010 ◽  
Vol 47 (5) ◽  
pp. 1246-1249 ◽  
Author(s):  
Li Qiang Wu ◽  
Wei Lin Li ◽  
Fu Lin Yan
Keyword(s):  
Sulfamic Acid ◽  
Solvent Free ◽  
Solvent Free Conditions ◽  
Acid Catalyzed

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.

Mandelic acid catalyzed one-pot three-component synthesis of α-aminonitriles and α-aminophosphonates under solvent-free conditions at room temperature

2020 ◽  
Vol 50 (10) ◽  
pp. 1545-1560 ◽  
Author(s):  
Gurpreet Kaur ◽  
Mussarat Shamim ◽  
Vaishali Bhardwaj ◽  
Vivek Kumar Gupta ◽  
Bubun Banerjee
Keyword(s):  
Mandelic Acid ◽  
Room Temperature ◽  
Solvent Free ◽  
One Pot ◽  
Solvent Free Conditions ◽  
Acid Catalyzed
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