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Zarei M, Naeimi H. Design, preparation and characterization of magnetic nanoparticles functionalized with chitosan/Schiff base and their use as a reusable nanocatalyst for the green synthesis of 1 H-isochromenes under mild conditions. RSC Adv 2024; 14:1407-1416. [PMID: 38174241 PMCID: PMC10763658 DOI: 10.1039/d3ra06416f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 12/15/2023] [Indexed: 01/05/2024] Open
Abstract
In this study, a Schiff base complex magnetic nanocatalyst was designed and prepared. The structure of the Fe3O4@CS-SB-CaMgFe2O4 nanocatalyst was characterized using FT-IR spectroscopy, XRD, VSM, FE-SEM, EDX, elemental mapping, BET, and TGA techniques. The synthesis of 1H-isochromene compounds has attracted the attention of chemists due to their biological and medicinal properties. The 1H-isochromene derivatives were synthesized in the presence of the Fe3O4@CS-SB-CaMgFe2O4 nanocatalyst with excellent efficiency and short reaction time as well as according to the rules of green chemistry. This reaction was carried out using Fe3O4@CS-SB-CaMgFe2O4 as a catalyst to develop a simple method with low activation energy at room temperature under optimal conditions. This catalyst provides a promising route for the synthesis of 1H-isochromene multiple times through its recyclability without significant loss of catalytic activity. This nanocatalyst possesses several advantages, including cost-effectiveness, facile separation, environmental friendliness, and recyclability, for the efficient production of 1H-isochromenes. The obtained compounds were further analyzed using spectroscopic techniques, such as melting point, FT-IR, 1H NMR, and 13C NMR analyses, to confirm their structures. The spectra of the synthesized compounds were recorded and analyzed, and a plausible mechanism for their synthesis was proposed. The characterization results and structural elucidation provide valuable insights into the preparation of these compounds.
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Affiliation(s)
- Mahshid Zarei
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan Kashan 87317-51167 I.R. Iran +98 3155912397 +98 3155912388
| | - Hossein Naeimi
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan Kashan 87317-51167 I.R. Iran +98 3155912397 +98 3155912388
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Kazempour S, Naeimi H. Design, fabrication and characterization of mesoporous yolk-shell nanocomposites as a sustainable heterogeneous nanocatalyst for synthesis of ortho-aminocarbonitrile tetrahydronaphthalenes. Sci Rep 2023; 13:22464. [PMID: 38105317 PMCID: PMC10725875 DOI: 10.1038/s41598-023-50021-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 12/14/2023] [Indexed: 12/19/2023] Open
Abstract
A new structure of mesoporous spherical nanocomposites was designed and easily prepared from the reaction between NiCuFe2O4 nanoparticles and mesoporous silica in three steps. The prepared multi-yolk@shell NiCuFe2O4@mSiO2 mesoporous sphere was characterized by using FT-IR, XRD, VSM, EDX, BET, FE-SEM and HR-TEM techniques. This unique mesoporous nanocomposite sphere as a heterogeneous nanocatalyst has demonstrated highly catalytic activity for the green synthesis of tetrahydronaphthalene derivatives in 92-98% yields at reaction times of 60-75 min. This process was carried out through multi-component reaction of the cyclic ketone, malononitrile and aromatic aldehyde under solvent-free conditions. Furthermore, the procedure was optimized on the basis of catalyst loading amounts, various solvents and temperature conditions. This novel methodology exposes obvious benefits such as; catalyst reusability, easy reaction procedure, simplicity of work-up, excellent product yields and short reaction times.
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Affiliation(s)
- Somayeh Kazempour
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317-51167, Islamic Republic of Iran
| | - Hossein Naeimi
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317-51167, Islamic Republic of Iran.
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Hosseini S, Azizi N. CSA@g-C 3N 4 as a novel, robust and efficient catalyst with excellent performance for the synthesis of 4H-chromenes derivatives. Sci Rep 2023; 13:18961. [PMID: 37923798 PMCID: PMC10624862 DOI: 10.1038/s41598-023-46122-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 10/27/2023] [Indexed: 11/06/2023] Open
Abstract
A pioneering robust and green heterogeneous acidic catalyst (CSA@g-C3N4) was rationally designed via immobilization of camphorsulfonic acid (CSA) on the g-C3N4 surface under mild conditions. Grafting CSA in the g-C3N4 lattice is distinguished as the root cause of facilitating the structure change of g-C3N4, leading to a unique morphology, accordingly the remarkable catalytic efficiency of CSA@g-C3N4. The morphology of new as-prepared nano-catalyst was specified by means of FT-IR, XRD, SEM, EDS, TEM, TGA, and BET. For the first time, it is exhibited that the efficient catalyst CSA@g-C3N4 can productively accomplish the three-component reactions with high yields and also serve as an inspiration for easily performing various sorts of MCRs based on our finding. The recommended synthesis pathway of chromenes derivatives is facile and cost-effective which applies a condensation reaction of salicylaldehyde, thiophenol, and malononitrile followed by ready purification in a benign manner. Moreover, the CSA@g-C3N4 nanocomposite can be promptly reused, illustrating no sensational decrease in the catalytic activity after ten times.
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Affiliation(s)
- Saber Hosseini
- Chemistry and Chemical Engineering Research Center of Iran, P.O. Box 14335-186, Tehran, Iran.
| | - Najmedin Azizi
- Chemistry and Chemical Engineering Research Center of Iran, P.O. Box 14335-186, Tehran, Iran.
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Khorasani M, Naeimi H. Fabrication and characterization of mesoporous yolk-shell nanocomposites as an effective reusable heterogeneous base catalyst for the synthesis of ortho-aminocarbonitrile tetrahydronaphthalenes. RSC Adv 2023; 13:18690-18699. [PMID: 37346937 PMCID: PMC10281005 DOI: 10.1039/d3ra02740f] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 06/13/2023] [Indexed: 06/23/2023] Open
Abstract
Mesoporous yolk-shell nanocomposites (MYSNs) were loaded with a mobile CaMg core inside the silica shell. CaMg@MYS nanocomposites have been effectively prepared inside the inner cavity of a novel structure that consists of hollow mesoporous silica spheres. Tetraethyl orthosilicate (TEOS) and an amount of cetyltrimethylammonium bromide (CTAB) are coated on the carbon spheres used as a hard template in the multi-step synthetic procedure. In this method, the target products were obtained in high to excellent yields between 87-96% and quick response times between 10-20 minutes under mild conditions. The CaMg@MYS catalyst shows promise as an efficient and reusable catalyst in multicomponent processes. The CaMg@MYS multi-yolk spheres compared to metal oxide nanostructures indicated both high catalytic performance and a significant factor as a novelty. To identify each product, FT-IR, 1H NMR, and melting point techniques were applied. Also, in order to characterize the prepared catalysts, FT-IR, XRD, FE-SEM, EDS, elemental mapping, and HR-TEM techniques were applied.
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Affiliation(s)
- Mahsa Khorasani
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan Kashan 87317-51167 Iran +983155912397 +98-31-55912388
| | - Hossein Naeimi
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan Kashan 87317-51167 Iran +983155912397 +98-31-55912388
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Taheri M, Naeimi H, Ghasemi AH. Preparation and characterization of doped hollow carbon spherical nanostructures with nickel and cobalt metals and their catalysis for the green synthesis of pyridopyrimidines. RSC Adv 2023; 13:3623-3634. [PMID: 36756581 PMCID: PMC9891082 DOI: 10.1039/d2ra07152e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 01/05/2023] [Indexed: 01/27/2023] Open
Abstract
Fused heterocyclic systems containing the pyrimidine ring structure perform a significant role in numerous biological and pharmaceutical processes. Their properties include antibacterial, antifungal, anti-fever, anti-tumor, and antihistamine. As pyridopyrimidines are important in the essential fields of pharmaceutical chemistry, efficient methods for preparing these heterocycles are presented. In this study, a method for producing improved hollow carbon sphere nanostructures with cobalt and nickel (Co-Ni@HCSs) is presented. The nanocatalyst was prepared and identified by applying Fourier-transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), Brunauer-Emmett-Teller (BET), and elemental mapping techniques. The Co-Ni@HCSs nanocatalyst was proved to be highly efficient in synthesizing pyranopyrimidine derivatives. The sizeable active site, economic catalyst loading, easy workup, reusability, green reaction conditions, and excellent yields of all derivatives are some of the significant features of this process. Also, applying response surface methodology (RSM) and the Box-Behnken design (BBD) techniques allowed us to determine the influential factors of the laboratory variables and identify the optimum conditions for superior catalytic activity. Finally, synthesized organic compounds were identified by utilizing melting point, FT-IR, and hydrogen-1 nuclear magnetic resonance (1H NMR) analyses.
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Affiliation(s)
- Maryam Taheri
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan Kashan 87317-51167 Iran +983155912397 +983155912388
| | - Hossein Naeimi
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan Kashan 87317-51167 Iran +983155912397 +983155912388
| | - Amir Hossein Ghasemi
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan Kashan 87317-51167 Iran +983155912397 +983155912388
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Khorasani M, Naeimi H. Synthesis of orthoaminocarbonitrile tetrahydronaphthalenes catalyzed by butyl-3-methylimidazolium hexafluorophosphate ionic liquid base catalyst. SYNTHETIC COMMUN 2022. [DOI: 10.1080/00397911.2022.2119579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Mahsa Khorasani
- Faculty of Chemistry, Department of Organic Chemistry, University of Kashan, Kashan, Islamic Republic of Iran
| | - Hossein Naeimi
- Faculty of Chemistry, Department of Organic Chemistry, University of Kashan, Kashan, Islamic Republic of Iran
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[MerDABCO-BSA][HSO4]2: A novel polymer supported Brønsted acidic ionic liquid catalyst for the synthesis of biscoumarins and ortho-aminocarbonitriles. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132622] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Tamilthendral V, Ramesh R, Malecki JG. New ruthenium( ii) catalysts enable the synthesis of 2-amino-4 H-chromenes using primary alcohols via acceptorless dehydrogenative coupling. NEW J CHEM 2022. [DOI: 10.1039/d2nj03268f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Direct access to a diverse range of 2-amino-4H-chromenes was established in excellent yields through a one-pot multicomponent ADC reaction of benzyl alcohols catalysed by p-cymene Ru(ii) complexes under additive/promotor-free conditions.
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Affiliation(s)
- Veerappan Tamilthendral
- Centre for Organometallic Chemistry, School of Chemistry, Bharathidasan University, Tiruchirappalli-620 024, Tamilnadu, India
| | - Rengan Ramesh
- Centre for Organometallic Chemistry, School of Chemistry, Bharathidasan University, Tiruchirappalli-620 024, Tamilnadu, India
| | - Jan Grzegorz Malecki
- Department of Crystallography, Institute of Chemistry, University of Silesia, 40-006 Katowice, Poland
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Rahmatinejad S, Naeimi H. Graphitic carbon nitride supported neodymium oxide as an efficient recyclable nanocatalyst for the one-pot synthesis of diazabenzo[ a]anthraceneones. Dalton Trans 2021; 51:1163-1174. [PMID: 34940768 DOI: 10.1039/d1dt03695e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
In this research, a neodymium oxide@graphitic-carbon nitride nanocomposite was prepared and used as an efficient catalyst for the synthesis of some diazabenzo[a]anthraceneones under solvent-free conditions. The characterization of the Nd2O3@g-C3N4 nanocomposite was carried out by Fourier transform infrared spectroscopy (FT-IR), powder X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), field emission scanning electron microscopy (FE-SEM) and thermo-gravimetric analysis (TGA). The as-prepared compound was used as a catalyst for the one-pot three-component reaction of 2-naphthol, different substituted aromatic aldehydes, barbituric acid and its derivatives under solvent-free conditions. The catalyst is highly efficient, stable, separable, and recyclable and provides the corresponding diazabenzo[a]anthraceneones in good to high yields. This method provides several advantages such as mild reaction conditions, operational simplicity, low cost, safety, easy work up procedures and purification of products, low catalyst loading and reusability of the catalyst.
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Affiliation(s)
- Soraya Rahmatinejad
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317-51167, I.R. Iran.
| | - Hossein Naeimi
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317-51167, I.R. Iran.
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