scholarly journals Sulfonated Pyromellitic Dianhydride-functionalized MCM-41: A Multifunctional Hybrid Catalyst for Melting-assisted Solvent-free Synthesis of Bioactive 3,4-dihydropyrimidin-2-(1H)-ones

2021 ◽  
Author(s):  
Ehsan Valiey ◽  
Mohammad Dekamin ◽  
Zahra Alirezvani
Keyword(s):  
Structural Characteristics ◽  
High Surface ◽  
High Surface Area ◽  
Solvent Free ◽  
Biologically Active ◽  
Pyromellitic Dianhydride ◽  
Hybrid Catalyst ◽  
Solvent Free Conditions ◽  
Acidic Sites ◽  
Mcm 41

Abstract This study introduces a practical approach to fabricate a novel hybrid catalyst of namely sulfonated pyromellitic dianhydride-aminopropyl silane-functionalized MCM-41 (MCM-41-APS-PMDA-SO3H). Various microscopic, spectroscopic methods and techniques such as FTIR, TGA, XRD, FESEM, and EDX were used to confirm its structural characteristics. The efficiency of the new MCM-41-APS-PMDA-SO3H organosilica nanomaterials, as a heterogenous nanocatalyst, was evaluated in promoting the synthesis of biologically active 3,4-dihydropyrimidin-2-(1H)-one derivatives under solvent-free conditions. It is not only a nano-porous material for enriching reactants with high surface area provided, but also possesses great acidic sites to activate carbonyl groups. Furthermore, favored reusability of the new introduced hybrid organosilica with negligible loss of its activity, easy and quick isolation of the products are the main advantages of this procedure.

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.

Mesoporous nanocrystalline MgAl2O4: A new heterogeneous catalyst for the synthesis of 2,4,6-triarylpyridines under solvent-free conditions

2013 ◽  
Vol 67 (7) ◽  
Author(s):  
Javad Safari ◽  
Zohre Zarnegar ◽  
Mahmoud Borujeni
Keyword(s):  
Heterogeneous Catalyst ◽  
Heterogeneous Catalysts ◽  
High Surface ◽  
High Surface Area ◽  
Aromatic Aldehydes ◽  
Point Of View ◽  
Solvent Free ◽  
One Pot ◽  
Environmental Friendliness ◽  
Solvent Free Conditions

AbstractIn this paper, one-pot synthesis of 2,4,6-triarylpyridine by condensation of subsisted acetophenone (II), aromatic aldehydes (I), and ammonium acetate (III) in the presence of nanocrystalline MgAl2O4 as a new heterogeneous catalyst under solvent-free conditions is reported. Advantages of this method are the use of spatially-hindered aldehydes such as 2-methoxy-, 2-fluoro-, and 2-chlorobenzaldehydes, a new nanocatalyst with high surface area, shorter reaction time, easier workup, higher yield, and its environmental friendliness. The performance of this reaction under solvent free conditions using heterogeneous catalysts like MgAl2O4 could enhance its efficiency from an economic as well as green chemistry point of view.

A Mesoporous ErIII-MCM-41 Catalyst for the Cyanosilylation of Aldehydes and Ketones under Solvent-free Conditions

ChemSusChem ◽  
2008 ◽  
Vol 1 (11) ◽  
pp. 916-919 ◽  
Author(s):  
Antonio Procopio ◽  
Gobind Das ◽  
Monica Nardi ◽  
Manuela Oliverio ◽  
Luigi Pasqua
Keyword(s):  
Solvent Free ◽  
Solvent Free Conditions ◽  
Aldehydes And Ketones ◽  
Mcm 41

Synthesis and structural characteristics of high surface area TiO2 aerogels by ultrasonic-assisted sol–gel method

2018 ◽  
Vol 29 (7) ◽  
pp. 075702 ◽  
Author(s):  
Feng Qingge ◽  
Cai Huidong ◽  
Lin Haiying ◽  
Qin Siying ◽  
Liu Zheng ◽  
...  
Keyword(s):  
Surface Area ◽  
Structural Characteristics ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Gel Method ◽  
Sol Gel Method ◽  
Ultrasonic Assisted

A heterogeneous catalytic strategy for facile production of benzimidazoles and quinoxalines from primary amines using Al-MCM-41 catalyst

2021 ◽  
Author(s):  
Narender Nama ◽  
Vasu Amrutham ◽  
Naresh Mameda ◽  
Krishna Sai Gajula ◽  
Divya rohini yennamaneni ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Solvent Free ◽  
Nitrogen Heterocycle ◽  
Primary Amines ◽  
Heterogeneous Catalytic ◽  
Solvent Free Conditions ◽  
Mcm 41

This study reports a straightforward heterogonous catalytic (Al-MCM-41) approach to synthesize nitrogen heterocycle moieties from primary amines under solvent-free conditions. The Al-MCM-41 catalyst was prepared using a hydrothermal method and...

A novel inorganic–organic nanohybrid material H4SiW12O40/pyridino-MCM-41 as efficient catalyst for the preparation of 1-amidoalkyl-2-naphthols under solvent-free conditions

2015 ◽  
Vol 44 (20) ◽  
pp. 9596-9609 ◽  
Author(s):  
R. Tayebee ◽  
M. M. Amini ◽  
M. Akbari ◽  
A. Aliakbari
Keyword(s):  
Solvent Free ◽  
One Pot ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
The One ◽  
Substituted 1 ◽  
Nanohybrid Material ◽  
Mcm 41

A new inorganic–organic nanohybrid material was prepared and performed as an efficient catalyst for the one-pot multi-component synthesis of different substituted 1-amidoalkyl-2-naphthols under solvent-free conditions.

scholarly journals Ultrasonic-assisted preparation of highly active Co3O4/MCM-41 adsorbent and its desulfurization performance for low H2S concentration gas

RSC Advances ◽  
2020 ◽  
Vol 10 (50) ◽  
pp. 30214-30222
Author(s):  
Bolong Jiang ◽  
Jiaojing Zhang ◽  
Yanguang Chen ◽  
Hua Song ◽  
Tianzhen Hao ◽  
...  
Keyword(s):  
Surface Area ◽  
Active Sites ◽  
High Surface ◽  
High Surface Area ◽  
Highly Active ◽  
Ultrasonic Assisted ◽  
Sulfur Capacity ◽  
Mcm 41

Co3O4/MCM-41 adsorbent with high surface area and more active sites was successfully prepared by ultrasonic assisted impregnation (UAI) technology and it has been found that the sulfur capacity was improved by 33.2% because of ultrasonication.

scholarly journals Catalytic Performance of SBA-15-Supported Poly (Styrenesulfonic Acid) in the Esterification of Acetic Acid with n-Heptanol

2020 ◽  
Vol 10 (17) ◽  
pp. 5835
Author(s):  
Abdulaziz Ali Alghamdi ◽  
Yahya Musawi Mrair ◽  
Fahad A. Alharthi ◽  
Abdel-Basit Al-Odayni
Keyword(s):  
Acetic Acid ◽  
Sulfonic Acid ◽  
Active Sites ◽  
Structural Characteristics ◽  
High Surface ◽  
High Surface Area ◽  
Reaction Times ◽  
Hydrophobic Surface ◽  
Catalytic Performance ◽  
Catalyst Load

A polystyrene sulfonic acid-functionalized mesoporous silica (SBA-15-PSSA) catalyst was synthesized via an established multistep route, employing 2-bromo-2-methylpropionyl bromide as initiator of atom transfer radical polymerization. Fourier-transform infrared spectroscopy, thermogravimetric/differential thermal, Brunauer–Emmett–Teller, and transmission electron microscopy analyses revealed outstanding structural characteristics of the catalyst, including highly ordered mesopores, high surface area (726 m2/g), and adequate estimated concentrations of active sites (0.70 mmol H+/g). SBA-15-PSSA’s catalytic performance was evaluated in the esterification of acetic acid and n-heptanol as a model system at various temperatures (50–110 °C), catalyst loads (0.1–0.3 g), and reaction times (0–160 min). The conversion percentage of acetic acid was found to increase with the temperature, catalyst load, and reaction time. Furthermore, results indicated a fast conversion in the first 20 min of the reaction, with remarkable conversion values at 110 °C, reaching 86%, 94%, and 97% when the catalyst load was 0.1, 0.2, and 0.3 g, respectively; notably, at this temperature, 100% conversation was achieved after 60 min. At 110 °C, the reaction conducted in the presence of 0.3 g of catalyst displayed more than 6.4 times the efficiency of the uncatalyzed reaction. Such activity is explained by the concomitant presence in the polymer of strong sulfonic acid moieties and a relatively high hydrophobic surface, with adequate numbers of active sites for ester production.

Adsorption of different dyes from aqueous solution using Si-MCM-41 having very high surface area

2016 ◽  
Vol 23 (5) ◽  
pp. 1227-1237 ◽  
Author(s):  
Haribandhu Chaudhuri ◽  
Subhajit Dash ◽  
Ashis Sarkar
Keyword(s):  
Aqueous Solution ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Very High ◽  
Mcm 41
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