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Zamenraz S, Jafarpour M, Eskandari A, Rezaeifard A. Vitamin B5 copper conjugated triazine dendrimer improved the visible-light photocatalytic activity of TiO 2 nanoparticles for aerobic homocoupling reactions. Sci Rep 2024; 14:2691. [PMID: 38302498 PMCID: PMC10834398 DOI: 10.1038/s41598-024-52339-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 01/17/2024] [Indexed: 02/03/2024] Open
Abstract
In this work, Cu-vitamin B5 (pantothenic acid) bonded to 2,4,6-trichloro-1,3,5-triazine produced a bioconjugated dendrimer giving rise to the visible-light photocatalytic activity of nanocrystalline TiO2. XPS spectra uncovered the coexistence of Cu(II)/Cu(I) oxidation states with a predominant contribution of Cu(I). The new heterogeneous bio-relevant Cu-photocatalyst (Cu(I) Cu(II) [PTAPA G2-B5] @TiO2) revealed a band gap value [Eg = (2.8 eV)] less than those of Cu free components [PTAPA G1-B5]@TiO2 (3.04) and [PTAPA G2-B5]@TiO2 (3.06) and particularly the bare TiO2 (3.15 eV). The reactions showed to be light-dependent with the best performance under room light bulbs. The photocatalytic efficiency of the as-prepared heterojunction photocatalyst was exploited in the aerobic Csp2-Csp2 homocoupling of phenylboronic acid and Csp-Csp homocoupling of phenyl acetylenes under visible-light irradiation to prepare structurally and electronically different biaryls. A radical pathway relying on the photogenerated e- and h+ and involving the Cu(I)-Cu(II) synergistic cooperation was postulated. The reusability and stability of the catalyst were verified by the recycling test, FT-IR spectra, and ICP-OES analysis.
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Affiliation(s)
- Samira Zamenraz
- Catalysis Research Laboratory, Department of Chemistry, Faculty of Science, University of Birjand, Birjand, 97179-414, Iran
| | - Maasoumeh Jafarpour
- Catalysis Research Laboratory, Department of Chemistry, Faculty of Science, University of Birjand, Birjand, 97179-414, Iran.
| | - Ameneh Eskandari
- Catalysis Research Laboratory, Department of Chemistry, Faculty of Science, University of Birjand, Birjand, 97179-414, Iran
| | - Abdolreza Rezaeifard
- Catalysis Research Laboratory, Department of Chemistry, Faculty of Science, University of Birjand, Birjand, 97179-414, Iran.
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2
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Monga J, Ghosh NS, Rani I, Singh R, Deswal G, Dhingra AK, Grewal AS. Unlocking the Pharmacological Potential of Benzimidazole Derivatives: A Pathway to Drug Development. Curr Top Med Chem 2024; 24:437-485. [PMID: 38311918 DOI: 10.2174/0115680266283641240109080047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 12/23/2023] [Accepted: 01/02/2024] [Indexed: 02/06/2024]
Abstract
Heterocyclic molecules have fascinated a massive interest in medicinal chemistry. They are heterocyclic compounds that have gained significance due to their diverse variety of pharmacological activities. Benzimidazole is a heterocyclic compound consisting of benzene and imidazole rings. The ease of synthesis and the structural versatility of benzimidazole make it a promising scaffold for drug development. Many biological actions of benzimidazole derivatives have been well documented, including antibacterial, antiviral, anticancer, anti-inflammatory, antitubercular, and anthelmintic properties. The mechanism of action of benzimidazole derivatives varies with their chemical structure and target enzyme. This review has explored numerous methods for producing benzimidazole derivatives as well as a broad range of pharmacological activities. SAR investigations are also discussed in this review as they provide crucial details regarding the essential structural qualities that benzimidazole derivatives must have in order to be biologically active, which could aid in the rational design of new drug candidates. Benzimidazole scaffold is an exclusive structure in drug design and discovery. Many new pharmaceutical drugs containing benzimidazole are anticipated to be available within the next ten years as a result of the extensive therapeutic applications of benzimidazole and its derivatives. This review inspired many researchers to develop more biologically active compounds bearing benzimidazole, expanding the scope of finding a remedy for other diseases. From this study, we concluded that 2-substituted benzimidazole was considered more extensively by researchers.
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Affiliation(s)
- Jyoti Monga
- Adarsh Vijendra Institute of Pharmaceutical Sciences, Shobhit University, Gangoh, Uttar Pradesh, India
- Ch. Devi Lal College of Pharmacy, Jagadhri, Yamuna Nagar, Haryana, India
| | - Niladry S Ghosh
- Faculty of Pharmaceutical Sciences, Assam down town University, Guwahati, Assam, India
| | - Isha Rani
- Spurthy College of Pharmacy, Marasur Gate, Bengaluru, Karnataka, India
| | - Ranjit Singh
- Adarsh Vijendra Institute of Pharmaceutical Sciences, Shobhit University, Gangoh, Uttar Pradesh, India
| | - Geeta Deswal
- Guru Gobind Singh College of Pharmacy, Yamuna Nagar, Haryana, India
| | | | - Ajmer S Grewal
- Guru Gobind Singh College of Pharmacy, Yamuna Nagar, Haryana, India
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3
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Rezaeifard A, Rezaei M, Keikha N, Jafarpour M, Chen P, Jiang H. Enhanced Visible-Light-Induced Photocatalytic Activity in M(III)Salophen-Decorated TiO 2 Nanoparticles for Heterogeneous Degradation of Organic Dyes. ACS OMEGA 2023; 8:3821-3834. [PMID: 36743068 PMCID: PMC9893450 DOI: 10.1021/acsomega.2c05971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 12/29/2022] [Indexed: 06/18/2023]
Abstract
In this work, the construction of two heterojunction photocatalysts by coordinative anchoring of M(salophen)Cl complexes (M = Fe(III) and Mn(III)) to rutile TiO2 through a silica-aminopyridine linker (SAPy) promotes the visible-light-assisted photodegradation of organic dyes. The degradation efficiency of both cationic rhodamine B (RhB) and anionic methyl orange (MO) dyes by Fe- and Mn-TiO2-based catalysts in the presence of H2O2 under sunlight and low-wattage visible bulbs (12-18 W) is investigated. Anionic MO is more degradable than cationic RhB, and the Mn catalyst shows more activity than its Fe counterpart. Action spectra demonstrate the maximum apparent quantum efficiency (AQY) at 400-450 nm, confirming the visible-light-driven photocatalytic reaction. The enhanced photocatalytic activity might be attributed to the improved charge transfer in the heterojunction photocatalysts evidenced by photoluminescence (PL) and electrochemical impedance spectroscopy (EIS) analyses. A radical pathway for the photodegradation of dyes is postulated based on scavenging experiments and spectral data. This work provides new opportunities for constructing highly efficient catalysts for wastewater treatment.
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Affiliation(s)
- Abdolreza Rezaeifard
- Catalysis
Research Laboratory, Department of Chemistry, Faculty of Science, University of Birjand, Birjand 97179-414, Iran
| | - Masoumeh Rezaei
- Catalysis
Research Laboratory, Department of Chemistry, Faculty of Science, University of Birjand, Birjand 97179-414, Iran
| | - Narges Keikha
- Catalysis
Research Laboratory, Department of Chemistry, Faculty of Science, University of Birjand, Birjand 97179-414, Iran
| | - Maasoumeh Jafarpour
- Catalysis
Research Laboratory, Department of Chemistry, Faculty of Science, University of Birjand, Birjand 97179-414, Iran
| | - Pinghua Chen
- Key
Laboratory of Jiangxi Province for Persistent Pollutants Control and
Resources Recycle, Nanchang 330063, P. R. China
- Department
of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, P. R. China
| | - Hualin Jiang
- Key
Laboratory of Jiangxi Province for Persistent Pollutants Control and
Resources Recycle, Nanchang 330063, P. R. China
- Department
of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, P. R. China
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4
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Kuchkina N, Sorokina S, Torozova A, Bykov A, Shifrina Z. Ni nanoparticles Entrapped by a Functional Dendrimer as a Highly Efficient and Recyclable Catalyst for Suzuki‐Miyaura Cross‐Coupling Reactions. ChemistrySelect 2022. [DOI: 10.1002/slct.202202653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Nina Kuchkina
- A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilov St. Moscow 119991 Russia
| | - Svetlana Sorokina
- A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilov St. Moscow 119991 Russia
| | - Alexandra Torozova
- A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilov St. Moscow 119991 Russia
| | - Alexey Bykov
- Department of Biotechnology and Chemistry Tver State Technical University 22, A. Nikitina St. 170026 Tver Russia
| | - Zinaida Shifrina
- A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilov St. Moscow 119991 Russia
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5
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Ni Nanoparticles Stabilized by Hyperbranched Polymer: Does the Architecture of the Polymer Affect the Nanoparticle Characteristics and Their Performance in Catalysis? Int J Mol Sci 2022; 23:ijms232213874. [PMID: 36430353 PMCID: PMC9696000 DOI: 10.3390/ijms232213874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/04/2022] [Accepted: 11/07/2022] [Indexed: 11/12/2022] Open
Abstract
Heat-up and hot-injection methods were employed to synthesize Ni nanoparticles (NPs) with narrow size distribution in the presence of hyperbranched pyridylphenylene polymer (PPP) as a stabilizing agent. It was shown that depending on the synthetic method, Ni NPs were formed either in a cross-linked polymer network or stabilized by a soluble hyperbranched polymer. Ni NPs were characterized by a combination of transmission electron microscopy (TEM), scanning TEM, thermogravimetric analysis, powder X-ray diffraction, X-ray photoelectron spectroscopy, energy dispersive X-ray analysis, and magnetic measurements. The architecture of polymer support was found to significantly effect Ni NPs characteristics and behavior. The Ni NPs demonstrated a high catalytic activity in a model Suzuki-Miyaura cross-coupling reaction. No significant drop in activity was observed upon repeated use after magnetic separation in five consecutive catalytic cycles. We believe that hyperbranched PPP can serve as universal platform for the controllable synthesis of Ni NPs, acting as highly active and stable catalysts.
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Kumar A, Kujur S, Kujur JP, Sharma R, Pathak DD. Copper‐triazine‐dendrimer‐functionalized‐graphene oxide (CTD‐GO): Synthesis, characterization and application in green synthesis of propargylamines. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Akash Kumar
- Department of Chemistry and Chemical Biology Indian Institute of Technology (ISM) Dhanbad India
| | - Shelly Kujur
- Department of Chemistry and Chemical Biology Indian Institute of Technology (ISM) Dhanbad India
| | - Jyoti Prabha Kujur
- Department of Chemistry and Chemical Biology Indian Institute of Technology (ISM) Dhanbad India
| | - Richa Sharma
- Faculty of Science, Department of Chemistry Dayalbagh Educational Institute, Dayalbagh Agra India
| | - Devendra Deo Pathak
- Department of Chemistry and Chemical Biology Indian Institute of Technology (ISM) Dhanbad India
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7
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Pourmorteza N, Jafarpour M, Feizpour F, Rezaeifard A. TiO 2 nanoparticles decorated with Co-Schiff base-g-C 3N 4 as an efficient photocatalyst for one-pot visible light-assisted synthesis of benzimidazoles. RSC Adv 2022; 12:22526-22541. [PMID: 36106002 PMCID: PMC9366764 DOI: 10.1039/d2ra02699f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 07/13/2022] [Indexed: 01/19/2023] Open
Abstract
In this study, a novel heterogeneous visible light-driven nanocatalyst was produced via the complexation of Co(ii) with g-C3N4-imine-functionalized TiO2 nanoparticles. It was characterized using different techniques such as Fourier-transform infrared (FT-IR), energy-dispersive X-ray spectrum (EDS), inductively coupled plasma atomic emission spectroscopy (ICP-AES), thermogravimetric analysis (TGA), ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The catalyst promoted several different transformations in a one-pot reaction sequence: aerobic photooxidation of benzylic alcohols to aldehydes and then the tandem synthesis of benzimidazoles through the dehydrogenative coupling of primary benzylic alcohols and aromatic diamines. The photocatalyst proved to be highly active, robust, selective, and recyclable under organic reaction conditions and provided affordable products with good to high yields. The results proposed that the improved photoactivity predominantly benefits from the synergistic effects of the heterojunction of Co-carbon nitride on TiO2 nanoparticles. Moreover, this protocol provides standard conditions avoiding undesirable additives and limitations of oxidation methods, and may help to develop a new strategy for the development of photocatalysis based organic transformations. The Co-g-C3N4-imine/TiO2 nanohybrid promotes different transformations in a one-pot reaction sequence: aerobic photooxidation of benzylic alcohols to aldehydes, and then the tandem synthesis of benzimidazoles.![]()
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Affiliation(s)
- Narges Pourmorteza
- Catalysis Research Laboratory, Department of Chemistry, Faculty of Science, University of Birjand, Birjand, 97179-414, Iran
| | - Maasoumeh Jafarpour
- Catalysis Research Laboratory, Department of Chemistry, Faculty of Science, University of Birjand, Birjand, 97179-414, Iran
| | - Fahimeh Feizpour
- Catalysis Research Laboratory, Department of Chemistry, Faculty of Science, University of Birjand, Birjand, 97179-414, Iran
| | - Abdolreza Rezaeifard
- Catalysis Research Laboratory, Department of Chemistry, Faculty of Science, University of Birjand, Birjand, 97179-414, Iran
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8
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Qi Z, Yang Y, Miao T, Li L, Fu X. Progress in Photocatalytic Synthesis of Benzimidazoles. ChemistrySelect 2021. [DOI: 10.1002/slct.202103475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zhulin Qi
- College of Chemistry and Material Science Huaibei Normal University Huaibei China 235000
| | - Yang Yang
- College of Chemistry and Material Science Huaibei Normal University Huaibei China 235000
- School of Chemistry and Chemical Engineering Nanjing University of Science & Technology Nanjing China 21009
| | - Tao Miao
- College of Chemistry and Material Science Huaibei Normal University Huaibei China 235000
| | - Longfeng Li
- College of Chemistry and Material Science Huaibei Normal University Huaibei China 235000
| | - Xianliang Fu
- College of Chemistry and Material Science Huaibei Normal University Huaibei China 235000
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9
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Modification of Magnetite Nanoparticles with Triazine-Based Dendrons and Their Application as Drug-Transporting Systems. Int J Mol Sci 2021; 22:ijms222111353. [PMID: 34768784 PMCID: PMC8583946 DOI: 10.3390/ijms222111353] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/14/2021] [Accepted: 10/19/2021] [Indexed: 01/01/2023] Open
Abstract
The following research aims at the synthesis of magnetite nanoparticles functionalized with triazine-based dendrons and the application of the obtained materials as effective sorptive materials dedicated to acidic bioactive compounds. The adopted synthetic approach involved: (1) the synthesis of nanosized Fe3O4 particles via classic co-precipitation method, (2) the introduction of amine groups on their surface leading to materials’ precursor, and (3) the final synthesis of branched triazine-based dendrons on the support surface by an iterative reaction between cyanuric chloride (CC) and piperazine (p) or diethylenetriamine (DETA) via nucleophilic substitution. The characterized materials were tested for their adsorptive properties towards folic acid, 18β–glycyrrhetinic acid, and vancomycin, showing high adsorption capacities varying in the ranges of 53.33–401.61, 75.82–223.71, and 68.17–132.45 mg g−1, respectively. The formed material–drug complexes were also characterized for the drug-delivery potential, performed as in vitro release studies at pH 2.0 and 7.4, which mimics the physiological conditions. The release profiles showed that the proposed materials are able to deliver up to 95.2% of the drugs within 48 h, which makes them efficient candidates for further biomedical applications.
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10
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Eskandari P, Zand Z, Kazemi F, Ramdar M. Enhanced catalytic activity of one-dimensional CdS @TiO2 core-shell nanocomposites for selective organic transformations under visible LED irradiation. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113404] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Chen R, Jalili Z, Tayebee R. UV-visible light-induced photochemical synthesis of benzimidazoles by coomassie brilliant blue coated on W-ZnO@NH 2 nanoparticles. RSC Adv 2021; 11:16359-16375. [PMID: 35479136 PMCID: PMC9030167 DOI: 10.1039/d0ra10843j] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Accepted: 04/17/2021] [Indexed: 11/21/2022] Open
Abstract
Heterogeneous photocatalysts proffer a promising method to actualize eco-friendly and green organic transformations. Herein, a new photochemical-based methodology is disclosed in the preparation of a wide range of benzimidazoles through condensation of o-phenylenediamine with benzyl alcohols in the air under the illumination of an HP mercury lamp in the absence of any oxidizing species catalyzed by a new photocatalyst W–ZnO@NH2–CBB. In this photocatalyst, coomassie brilliant blue (CBB) is heterogenized onto W–ZnO@NH2 to improve the surface characteristics at the molecular level and enhance the photocatalytic activity of both W–ZnO@NH2 and CBB fragments. This unprecedented heterogeneous nanocatalyst is also identified by means of XRD, FT-IR, EDS, TGA-DTG, and SEM. The impact of some influencing parameters on the synthesis route and effects on the catalytic efficacy of W–ZnO@NH2–CBB are also assessed. The appropriate products are attained for both the electron-withdrawing and electron-donating substituents in the utilized aromatic alcohols. Furthermore, preparation of benzimidazoles is demonstrated to occur mainly via a radical mechanism, which shows that reactive species such as ·O2−, OH˙ and h+ would be involved in the photocatalytic process. Stability and reusability studies also warrant good reproducibility of the nanophotocatalyst for at least five runs. Eventually, a hot filtration test proved that the nanohybrid photocatalyst is stable in the reaction medium. Using an inexpensive catalyst, UV-vis light energy and air, as a low cost and plentiful oxidant, puts this methodology in the green chemistry domain and energy-saving organic synthesis strategies. Finally, the anticancer activity of W–ZnO nanoparticles is investigated on MCF7 breast cancer cells by MTT assay. This experiment reveals that the mentioned nanoparticles have significant cytotoxicity towards the selected cell line. A new photochemical route is disclosed in the preparation of a wide range of benzimidazoles in air under the illumination of an HP mercury lamp in the absence of any oxidizing species catalyzed by heterogenized W–ZnO@NH2–CBB.![]()
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Affiliation(s)
- Ruijuan Chen
- Department of Obstetrics and Gynecology, Xi'an Central Hospital Xi'an 710000 China
| | - Zahra Jalili
- Department of Chemistry, School of Sciences, Hakim Sabzevari University Sabzevar 96179-76487 Iran
| | - Reza Tayebee
- Department of Chemistry, School of Sciences, Hakim Sabzevari University Sabzevar 96179-76487 Iran
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12
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Tzani MA, Gabriel C, Lykakis IN. Selective Synthesis of Benzimidazoles from o-Phenylenediamine and Aldehydes Promoted by Supported Gold Nanoparticles. NANOMATERIALS 2020; 10:nano10122405. [PMID: 33271922 PMCID: PMC7760220 DOI: 10.3390/nano10122405] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 11/25/2020] [Accepted: 11/29/2020] [Indexed: 11/17/2022]
Abstract
We investigated the catalytic efficacy of supported gold nanoparticles (AuNPs) towards the selective reaction between o-phenylenediamine and aldehydes that yields 2-substituted benzimidazoles. Among several supported gold nanoparticle platforms, the Au/TiO2 provides a series of 2-aryl and 2-alkyl substituted benzimidazoles at ambient conditions, in the absence of additives and in high yields, using the mixture CHCl3:MeOH in ratio 3:1 as the reaction solvent. Among the AuNPs catalysts used herein, the Au/TiO2 containing small-size nanoparticles is found to be the most active towards the present catalytic methodology. The Au/TiO2 can be recovered and reused at least five times without a significant loss of its catalytic efficacy. The present catalytic synthetic protocol applies to a broad substrate scope and represents an efficient method for the formation of a C–N bond under mild reaction conditions. Notably, this catalytic methodology provides the regio-isomer of the anthelmintic drug, Thiabendazole, in a lab-scale showing its applicability in the efficient synthesis of such N-heterocyclic molecules at industrial levels.
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Affiliation(s)
- Marina A. Tzani
- Department of Chemistry, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece;
| | - Catherine Gabriel
- HERACLES Research Center, KEDEK, Laboratory of Environmental Engineering (EnvE-Lab), Department of Chemical Engineering, AUTH, 54124 Thessaloniki, Greece;
| | - Ioannis N. Lykakis
- Department of Chemistry, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece;
- Correspondence: ; Tel./Fax: +30-2310-997871
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13
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Dadwal S, Kumar M, Bhalla V. "Metal-Free" Nanoassemblies of AIEE-ICT-Active Pyrazine Derivative: Efficient Photoredox System for the Synthesis of Benzimidazoles. J Org Chem 2020; 85:13906-13919. [PMID: 33085479 DOI: 10.1021/acs.joc.0c01965] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Supramolecular nanoassemblies of an AIEE-ICT-active pyrazine derivative (TETPY) having strong absorption in the visible region and excellent transportability have been utilized as an efficient photoredox catalytic system for the synthesis of a variety of benzimidazoles having electron-withdrawing/electron-releasing/aliphatic groups under "metal-free" conditions. The reaction protocol involves the successful harvesting of visible light by TETPY assemblies to catalyze the coupling of o-phenylenediamine/substituted diamines and substituted aromatic/heterocyclic/aliphatic aldehydes under aerial conditions using mixed aqueous media as the reaction solvent. TETPY assemblies could activate aerial oxygen to generate superoxide for completing the vital proton abstraction step without the need for any external metal/base/oxidant. Moreover, all the products are purified by recrystallization from organic solvents. The TETPY assemblies also exhibited high efficiency in catalyzing the synthesis of 2-substituted benzothiazoles and quinazolines in excellent yields.
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Affiliation(s)
- Shruti Dadwal
- Department of Chemistry, UGC Centre of Advanced Study-II Guru Nanak Dev University, Amritsar 143005 Punjab, India
| | - Manoj Kumar
- Department of Chemistry, UGC Centre of Advanced Study-II Guru Nanak Dev University, Amritsar 143005 Punjab, India
| | - Vandana Bhalla
- Department of Chemistry, UGC Centre of Advanced Study-II Guru Nanak Dev University, Amritsar 143005 Punjab, India
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14
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Zuo M, Guo W, Pang Y, Guo R, Hou C, Sun S, Wu H, Sun Z, Chu W. Direct synthesis of 2-substituted benzimidazoles via dehydrogenative coupling of aromatic-diamine and primary alcohol catalyzed by a Co complex. NEW J CHEM 2020. [DOI: 10.1039/d0nj03619f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A Co(ii) complex was synthesized and used as catalyst to synthesize a series of 2-substituted benzimidazoles with o-phenylenediamines and primary alcohol as the substrates under mild reaction conditions.
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Affiliation(s)
- Minghui Zuo
- School of Chemistry and Materials Science
- Heilongjiang University
- Harbin 150080
- P. R. China
- Key Laboratory of Chemical Engineering Process and Technology for High-efficiency Conversion
| | - Weihao Guo
- School of Chemistry and Materials Science
- Heilongjiang University
- Harbin 150080
- P. R. China
- Key Laboratory of Chemical Engineering Process and Technology for High-efficiency Conversion
| | - Yucheng Pang
- School of Chemistry and Materials Science
- Heilongjiang University
- Harbin 150080
- P. R. China
- Key Laboratory of Chemical Engineering Process and Technology for High-efficiency Conversion
| | - Rui Guo
- School of Chemistry and Materials Science
- Heilongjiang University
- Harbin 150080
- P. R. China
- Key Laboratory of Chemical Engineering Process and Technology for High-efficiency Conversion
| | - Chuanfu Hou
- School of Chemistry and Materials Science
- Heilongjiang University
- Harbin 150080
- P. R. China
- Key Laboratory of Chemical Engineering Process and Technology for High-efficiency Conversion
| | - Shouneng Sun
- School of Chemistry and Materials Science
- Heilongjiang University
- Harbin 150080
- P. R. China
- Key Laboratory of Chemical Engineering Process and Technology for High-efficiency Conversion
| | - Hongfeng Wu
- School of Chemistry and Materials Science
- Heilongjiang University
- Harbin 150080
- P. R. China
- Key Laboratory of Chemical Engineering Process and Technology for High-efficiency Conversion
| | - Zhizhong Sun
- School of Chemistry and Materials Science
- Heilongjiang University
- Harbin 150080
- P. R. China
- Key Laboratory of Chemical Engineering Process and Technology for High-efficiency Conversion
| | - Wenyi Chu
- School of Chemistry and Materials Science
- Heilongjiang University
- Harbin 150080
- P. R. China
- Key Laboratory of Chemical Engineering Process and Technology for High-efficiency Conversion
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15
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Garazhian Z, Rezaeifard A, Jafarpour M. A nanoscopic icosahedral {Mo72Fe30} cluster catalyzes the aerobic synthesis of benzimidazoles. RSC Adv 2019; 9:34854-34861. [PMID: 35530665 PMCID: PMC9074170 DOI: 10.1039/c9ra06581d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 10/19/2019] [Indexed: 01/20/2023] Open
Abstract
In this study, the catalytic efficiency of amorphous {Mo72Fe30} nanocapsules as a safe Keplerate polyoxometalate in organic synthesis was exploited. The easy-made solid catalyst exhibited high efficiency using a very low dosage (0.02–0.05 mol%) in the catalyzed condensation of various aromatic 1,2-diamines and aldehydes for the aerobic synthesis of benzimidazoles with very small E-factor values (0.11–0.33). The superior catalytic activity of amorphous nanoclusters compared to that of its crystalline counterpart was demonstrated. The high activity and recyclability of heterogeneous catalysts in a green reaction media under oxygen atmosphere, make this environmentally benign organic process appropriate for our applied goals. Catalytic activity of amorphous {Mo72Fe30} nanoclusters as a safe Keplerate polyoxometalate in aerobic synthesis of benzimidazoles was described.![]()
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Affiliation(s)
- Zohreh Garazhian
- Catalysis Research Laboratory
- Department of Chemistry
- Faculty of Science
- University of Birjand
- Birjand
| | - Abdolreza Rezaeifard
- Catalysis Research Laboratory
- Department of Chemistry
- Faculty of Science
- University of Birjand
- Birjand
| | - Maasoumeh Jafarpour
- Catalysis Research Laboratory
- Department of Chemistry
- Faculty of Science
- University of Birjand
- Birjand
| |
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Khoshyan A, Pourtahmasb M, Feizpour F, Jafarpour M, Rezaeifard A. Aerobic {Mo
72
V
30
} nanocluster‐catalysed heterogeneous one‐pot tandem synthesis of benzimidazoles. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4638] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Ashkan Khoshyan
- Catalysis Research Laboratory, Department of Chemistry, Faculty of ScienceUniversity of Birjand Birjand 97179‐414 Iran
| | - Mehrdad Pourtahmasb
- Catalysis Research Laboratory, Department of Chemistry, Faculty of ScienceUniversity of Birjand Birjand 97179‐414 Iran
| | - Fahimeh Feizpour
- Catalysis Research Laboratory, Department of Chemistry, Faculty of ScienceUniversity of Birjand Birjand 97179‐414 Iran
| | - Maasoumeh Jafarpour
- Catalysis Research Laboratory, Department of Chemistry, Faculty of ScienceUniversity of Birjand Birjand 97179‐414 Iran
| | - Abdolreza Rezaeifard
- Catalysis Research Laboratory, Department of Chemistry, Faculty of ScienceUniversity of Birjand Birjand 97179‐414 Iran
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