Sulfonated β-cyclodextrins: efficient supramolecular organocatalysts for diverse organic transformations

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Bubun Banerjee ◽  
Anu Priya ◽  
Aditi Sharma ◽  
Gurpreet Kaur ◽  
Manmeet Kaur
Keyword(s):  
Sulfonic Acid ◽  
Present Review ◽  
Reusable Catalyst ◽  
Organic Transformations ◽  
Reaction Conditions

Abstract The present review summarizes various organic transformations carried out by using sulfonated β-cyclodextrins such as β-cyclodextrin sulfonic acid, β-cyclodextrin propyl sulfonic acid, and β-cyclodextrin butyl sulfonic acid as an efficient, supramolecular reusable catalyst under diverse reaction conditions.

Ultrasound-Promoted Organic Synthesis – A Recent Update

2021 ◽  
Vol 25 ◽  
Author(s):  
Goutam Brahmachari ◽  
Nayana Nayek ◽  
Mullicka Mandal ◽  
Anindita Bhowmick ◽  
Indrajit Karmakar
Keyword(s):  
Organic Chemistry ◽  
Green Chemistry ◽  
Organic Synthesis ◽  
Ultrasound Irradiation ◽  
Present Review ◽  
Organic Transformations ◽  
Reaction Conditions ◽  
Catalytic Systems ◽  
Bond Forming ◽  
Reducing Energy

: Ultrasonication, nowadays, is well-regarded as an effective green tool in implementing a plethora of organic transformations. The last decade has seen quite useful applications of ultrasound irradiation in synthetic organic chemistry. Ultrasound has already come out as a unique technique in green chemistry practice, for its inherent properties of minimizing wastes and reducing energy and time, thereby increasing the product yields with higher purities under milder reaction conditions. The present review summarizes ultrasound-promoted useful organic transformations involving both carbon-carbon and carbon-heteroatom (N, O, S) bond-forming reactions in the absence or presence of varying catalytic systems, reported during the period 2016-2020.

p-Sulfonic acid calix[n]arene catalyzed synthesis of bioactive heterocycles: A review

2020 ◽  
Vol 24 ◽  
Author(s):  
Bubun Banerjee ◽  
Gurpreet Kaur ◽  
Navdeep Kaur
Keyword(s):  
Supramolecular Chemistry ◽  
Sulfonic Acid ◽  
Catalytic Efficiency ◽  
The Other ◽  
Reaction Conditions ◽  
Metal Free ◽  
Bioactive Scaffolds ◽  
Wide Range ◽  
Efficient Alternative ◽  
Bioactive Heterocycles

: Metal-free organocatalysts are becoming an important tool for the sustainable developments of various bioactive heterocycles. On the other hand, during last two decades, calix[n]arenes have been gaining considerable attention due to their wide range of applicability in the field of supramolecular chemistry. Recently, sulfonic acid functionalized calix[n] arenes are being employed as an efficient alternative catalyst for the synthesis of various bioactive scaffolds. In this review we have summarized the catalytic efficiency of p-sulfonic acid calix[n]arenes for the synthesis of diverse biologically promising scaffolds under various reaction conditions. There is no such review available in the literature showing the catalytic applicability of p-sulfonic acid calix[n]arenes. Therefore, we strongly believe that this review will surely attract those researchers who are interested about this fascinating organocatalyst.

Cellulose sulfonic acid as a green, efficient, and reusable catalyst for Nazarov cyclization of unactivated dienones and pyrazoline synthesis

RSC Advances ◽  
2015 ◽  
Vol 5 (127) ◽  
pp. 104695-104707 ◽  
Author(s):  
Zahra Daneshfar ◽  
Ali Rostami
Keyword(s):  
Sulfonic Acid ◽  
Reusable Catalyst ◽  
Nazarov Cyclization

A high yielding and eco-friendly procedure for the preparation of cyclopentenoid and pyrazoline derivatives via cellulose sulfonic acid-mediated electrocyclization processes.

Novel Ceric Ammonium Nitrate-Stabilized Maghemite Nanoparticles (CAN-γ-Fe2O3) for Ultrasound Assisted Synthesis of β-Amino Derivatives

2021 ◽  
Author(s):  
Anurag Kumar ◽  
Yifat Harel ◽  
Jean-paul Lellouche ◽  
Suman L. Jain
Keyword(s):  
Carbonyl Compounds ◽  
Addition Reaction ◽  
Ceric Ammonium Nitrate ◽  
Reusable Catalyst ◽  
Maghemite Nanoparticles ◽  
Reaction Conditions ◽  
Recyclable Catalysts ◽  
Nucleophilic Addition Reaction ◽  
Amino Derivatives ◽  
Positively Charged

Abstract Owing to their inherent features like smaller size and higher surface area exposed to reactants, nanoparticles have gained enormous interest and are extensively used as magnetically recyclable catalysts for various organic reactions. Herein, we report highly hydrophilic, non-aggregated, and strongly positively charged (ζ potential: +45.7 mV) ultra-small cerium cations/complexes- stabilized maghemite nanoparticles in water as an efficient and reusable nanoscaled magnetically active catalyst for the nucleophilic addition reaction of various amines with α,β-unsaturated carbonyl compounds to give corresponding β-amino derivatives under ultrasonic irradiation. The developed protocol provides several merits such as high product yields, mild reaction conditions, reusable catalyst and easy workup.

scholarly journals Synthesis and Characterization of Functionalize HY Zeolite With Sulfunic Acid, A Micro-meso Structure as an Efficient Reusable Catalyst in Organic Transformations

2021 ◽  
Author(s):  
Mojgan Zendehdel ◽  
Fatemeh Tavakoli
Keyword(s):  
Reaction Times ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Organic Transformations ◽  
Hy Zeolite ◽  
New Class ◽  
Solvent Free Condition ◽  
Result Show ◽  
High Yields

Abstract A new class of catalyst has been prepared with sulfunic acid functionalized HY zeolite (HY-N-SO3H) and characterized by FESEM, TEM, FTIR, TGA, XRD and BET. The result show that the catalyst has the micro-meso structure without ordering in the mesophase. Then, two sets of organic reaction were examined to consider of catalytic activity. The micro-meso structure HY-N-SO3H was used as an acidic catalyst to synthesis of coumarins via Pechmann reaction and facile transformation of amines to formamides under solvent free condition. This catalyst was compared with NaY-N-SO3H and MCM-N-SO3H and pure porous material to consider of the effect of acidity and kind and size of porous in the catalyst. The significant advantages of HY-N-SO3H respect to other catalyst are short reaction times, high yields, pure products, mild conditions and easy workup. In addition, we report an original and environmentally friendly solvent-free procedures which reusability of catalyst makes this method nearly green and environmental friendly.

An efficient and eco-friendly method for the thiol-Michael addition in aqueous solutions using amino acid ionic liquids (AAILs) as organocatalysts

2020 ◽  
Vol 92 (1) ◽  
pp. 97-106
Author(s):  
Roberto Figueroa Guíñez ◽  
José G. Santos ◽  
Ricardo A. Tapia ◽  
Jackson J. Alcazar ◽  
Margarita E. Aliaga ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Ionic Liquids ◽  
Amino Acid ◽  
Efficient Method ◽  
Michael Addition ◽  
Rate Constants ◽  
Michael Reaction ◽  
High Rate ◽  
Reusable Catalyst ◽  
Reaction Conditions

AbstractA series of amino-acid based ionic liquids (Bmim[AA]s) have been synthesized and evaluated as catalysts, in aqueous solution. The results of a kinetic study of the thiol-Michael reaction of L-Cysteine with trans-β-nitrostyrene demonstrated the advantages of using (Bmim[AA]s) as organocatalysts. The benefits include high rate constants; mild reaction conditions; and, a reusable catalyst, which leads to a simple and efficient method for these important kinds of reactions.

Camphor-10-Sulfonic Acid (CSA): A Water Compatible Organocatalyst in Organic Transformations

2019 ◽  
Vol 5 (3) ◽  
pp. 165-181 ◽  
Author(s):  
Goutam Brahmachari ◽  
Khondekar Nurjamal ◽  
Indrajit Karmakar ◽  
Mullicka Mandal
Keyword(s):  
Sulfonic Acid ◽  
Organic Transformations

scholarly journals Efficient N-formylation of primary aromatic amines using novel solid acid magnetic nanocatalyst

RSC Advances ◽  
2020 ◽  
Vol 10 (67) ◽  
pp. 41229-41236
Author(s):  
Jitendra Kumar Yadav ◽  
Priyanka Yadav ◽  
Satish K. Awasthi ◽  
Alka Agarwal
Keyword(s):  
Magnetic Nanoparticles ◽  
Aromatic Amines ◽  
Sulfonic Acid ◽  
Solid Acid ◽  
Recyclable Catalyst ◽  
Primary Amines ◽  
Magnetic Nanocatalyst ◽  
Reaction Conditions ◽  
Primary Aromatic Amines ◽  
First Time

Sulfonic acid functionalized over biguanidine fabricated silica-coated heterogeneous magnetic nanoparticles (NP@SO3H) have been synthesized, well characterized and explored for the first time, as an efficient and recyclable catalyst for N-formylation of primary amines under mild reaction conditions.

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