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Ranjbar Derranji A, Anary-Abbasinejad M. An efficient synthesis of phosphonated cyclopentenones by NaN 3-catalyzed three-component reaction between trialkyl phosphites, ethyl arylmethylidenecyanoacetates and dialkyl acetylenedicarboxylates. Mol Divers 2024; 28:209-216. [PMID: 37843783 DOI: 10.1007/s11030-023-10744-1] [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: 05/21/2023] [Accepted: 10/05/2023] [Indexed: 10/17/2023]
Abstract
NaN3-catalysed three-component reaction between trialkyl phosphites, dialkyl acetylenedicarboxylates and ethyl arylmethylidenecyanoacetates afforded phosphonated cyclopentenone derivatives. The process involves one C-P and two C-C bond formations in one synthetic step. All reactions were conducted in acetone as solvent at room temperature and the products were obtained in high yields as stable solids. The products were isolated and purified by simple washing with water and diethyl ether without need to tedious chromatography methods. The structures of products were proved by 1H, 13C and 31P NMR and IR spectral and elemental analysis data.
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Affiliation(s)
- Akram Ranjbar Derranji
- Department of Chemistry, Faculty of Science, Vali-E-Asr University of Rafsanjan, Rafsanjan, 7718897111, Iran
| | - Mohammad Anary-Abbasinejad
- Department of Chemistry, Faculty of Science, Vali-E-Asr University of Rafsanjan, Rafsanjan, 7718897111, Iran.
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Mohamadpour F. A new role for concentrated solar radiation (CSR) as a renewable heat source for the catalyst-solvent free synthesis of tetrahydrobenzo[b]pyran scaffolds. Sci Rep 2023; 13:11485. [PMID: 37460799 DOI: 10.1038/s41598-023-38662-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 07/12/2023] [Indexed: 07/20/2023] Open
Abstract
Increased energy consumption as a result of population growth and industrialization necessitates the use of renewable energy sources in the field of chemistry. Nonrenewable energy sources release not only greenhouse gases but also other hazardous pollutants that are damaging to all living things. This plainly mandates the researchers' use of a renewable energy source that is both environmentally friendly and cost-effective. This study shows that a renewable energy source (sunlight) can be used to synthesize tetrahydrobenzo[b]pyran scaffolds using the Knoevenagel-Michael cyclocondensation of aldehyde derivatives, malononitrile, and dimedone via a three-condensation domino reaction. This research establishes a new role for solar energy as a renewable energy source for the synthesis of tetrahydrobenzo[b]pyran scaffolds under catalyst-solvent-free conditions, with outstanding yields, shorter reaction time, and great atom economy. This cyclization may also be done on a gram scale with free, safe, and clean energy from concentrated solar radiation (CSR), indicating the reaction's potential for industrial applications.
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Mohamadpour F. Synthesis of Tetrahydrobenzo[ b]pyrans Promoted by Sodium Stearate as a Lewis Base-Surfactant Combined Catalyst in an Aqueous Micellar Medium. ORG PREP PROCED INT 2023. [DOI: 10.1080/00304948.2022.2151812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Ostadzadeh H, Kiyani H. Multicomponent Synthesis of Tetrahydrobenzo[ b]Pyrans, Pyrano[2,3- d]Pyrimidines, and Dihydropyrano[3,2- c]Chromenes Catalyzed by Sodium Benzoate. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2162091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
| | - Hamzeh Kiyani
- School of Chemistry, Damghan University, Damghan, Iran
- Department of Chemistry, Faculty of Science, Shahrekord University, Shahrekord, Iran
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Direct Z-Scheme g-C3N5/Cu3TiO4 Heterojunction Enhanced Photocatalytic Performance of Chromene-3-Carbonitriles Synthesis under Visible Light Irradiation. Catalysts 2022. [DOI: 10.3390/catal12121593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
In order to make the synthesis of pharmaceutically active carbonitriles efficient, environmentally friendly, and sustainable, the method is regularly examined. Here, we introduce a brand-new, very effective Cu3TiO4/g-C3N5 photocatalyst for the production of compounds containing chromene-3-carbonitriles. The direct Z-Scheme photo-generated charge transfer mechanism used by the Cu3TiO4/g-C3N5 photocatalyst results in a suppressed rate of electron-hole pair recombination and an increase in photocatalytic activity. Experiments showed that the current method has some advantages, such as using an environmentally friendly and sustainable photocatalyst, having a simple procedure, quick reaction times, a good product yield (82–94%), and being able to reuse the photocatalyst multiple times in a row without noticeably decreasing its photocatalytic performance.
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Microwave Assisted Synthesis, Crystal Structure and Hirshfeld Surface Analysis of Some 2-Formimidate-3-carbonitrile Derivatives Bearing 4H-Pyran and Dihydropyridine Moieties. MOLBANK 2022. [DOI: 10.3390/m1364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Two 4H-pyran- and four dihydropyridine-based 2-formimidate-3-carbonitrile derivatives were synthesized via the conventional solvothermal and microwave radiation methods. The use of the latter technique led to the formation of the desired products in the order of minutes as compared to the former. The formation of the 2-formimidate-3-carbonitrile derivatives was confirmed using spectroscopic techniques whilst the molecular geometry and intermolecular interactions were investigated using single-crystal X-ray diffraction. The formimidate functional group was found to adopt an E configuration in all compounds and this coincides with those of closely related compounds on the Cambridge Structural Database (CSD). Classical but weak intermolecular C—H…O, C—H…N and C—H…π hydrogen bonds were observed in the crystal lattice. According to the Hirshfeld surface analysis, the C—H…π hydrogen bonds contributed the most towards the Hirshfeld surface (14.3–23.9%) than the other two hydrogen bonding types (9.6–12.7%).
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Mohamadpour F. Catalyst-Free and Solvent-Free Visible Light Assisted Synthesis of Tetrahydrobenzo[ b]Pyran Scaffolds at Room Temperature. Polycycl Aromat Compd 2021. [DOI: 10.1080/10406638.2021.2006244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Thongni A, Phanrang PT, Dutta A, Nongkhlaw R. One-pot synthesis of 2-amino-3-cyano-4H-pyrans and pyran-annulated heterocycles using sodium citrate as an organo-salt based catalyst in aqueous ethanol. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1998535] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Aiborlang Thongni
- Organic Synthesis Laboratory, Centre for Advanced Studies in Chemistry, North Eastern Hill University, Shillong, India
| | - Pynskhemborlang T. Phanrang
- Computational Laboratory, Centre for Advanced Studies in Chemistry, North Eastern Hill University, Shillong, India
| | - Arup Dutta
- Organic Synthesis Laboratory, Centre for Advanced Studies in Chemistry, North Eastern Hill University, Shillong, India
| | - Rishanlang Nongkhlaw
- Organic Synthesis Laboratory, Centre for Advanced Studies in Chemistry, North Eastern Hill University, Shillong, India
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Nesaragi AR, Kamble RR, Hoolageri SR, Mavazzan A, Madar SF, Anand A, Joshi SD. WELPSA: A natural catalyst of alkali and alkaline earth metals for the facile synthesis of tetrahydrobenzo[ b]pyrans and pyrano[2,3- d]pyrimidinones as inhibitors of SARS-CoV-2. Appl Organomet Chem 2021; 36:e6469. [PMID: 34898800 PMCID: PMC8646655 DOI: 10.1002/aoc.6469] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/07/2021] [Accepted: 09/13/2021] [Indexed: 11/11/2022]
Abstract
Since 2019, the infection of SARS‐CoV‐2 has been spreading worldwide and caused potentially lethal health problems. In view of this, the present study explores the most commodious and environmentally benign synthetic protocol for the synthesis of tetrahydrobenzo[b]pyran and pyrano[2,3‐d]pyrimidinones as SARS‐CoV‐2 inhibitors via three‐component cycloaddition of aromatic aldehyde, malononitrile, and dimedone/barbituric acid in water. Lemon peel from juice factory waste, namely, lemon (Citrus limon), sweet lemon (C. limetta), and Kaffir lime or Citron (C. hystrix), effectually utilized to obtain WELPSA, WESLPSA, and WEKLPSA, respectively, for the synthesis of title compounds. The catalyst was characterized by scanning electron microscope (SEM) and energy‐dispersive x‐ray spectroscopy (EDX). The concentration of sodium, potassium, calcium, and magnesium in the catalyst (WELPSA) was determined using atomic absorption spectrometry (AAS). The current approach manifests numerous notable advantages that include ease of preparation, handling and benignity of the catalyst, low cost, green reaction conditions, facile workup, excellent yields (93%–97%) with extreme purity, and recyclability of the catalyst. Compounds were docked on the crystal structure of SARS‐CoV‐2 (PDB: 6M3M). The consensus score obtained in the range 2.47–4.63 suggests that docking study was optimistic indicating the summary of all forces of interaction between ligands and the protein.
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Affiliation(s)
- Aravind R Nesaragi
- Department of Studies in Chemistry Karnatak University Dharwad Dharwad India
| | - Ravindra R Kamble
- Department of Studies in Chemistry Karnatak University Dharwad Dharwad India
| | - Swati R Hoolageri
- Department of Studies in Chemistry Karnatak University Dharwad Dharwad India
| | - Ahmedraza Mavazzan
- Department of Studies in Chemistry Karnatak University Dharwad Dharwad India
| | - Suresh F Madar
- Department of Studies in Chemistry Karnatak University Dharwad Dharwad India
| | - Ashish Anand
- Solid State and Structural Chemistry Unit Indian Institute of Science Bengaluru India
| | - Shrinivas D Joshi
- Novel Drug Design and Discovery Laboratory, Department of Pharmaceutical Chemistry S.E.T.'s College of Pharmacy Dharwad India
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Amirmahani N, Mahmoodi NO, Malakootian M, Pardakhty A. [TBP] 2SO 4 ionic liquid catalyst for 4MCR of pyridazinoindazole, indazolophthalazine and pyrazolophthalazine derivatives. Mol Divers 2020; 26:15-25. [PMID: 33150953 DOI: 10.1007/s11030-020-10153-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 10/23/2020] [Indexed: 02/07/2023]
Abstract
Tetrabutyl phosphonium sulfate ([TBP]2SO4), as novel room-temperature ionic liquid (RTIL), was synthesized by a simple cost-effective method, characterized by 1H, 13C, 31P NMR and FT-IR spectrophotometry. The newly prepared catalyst was used as an efficient catalyst in some four multicomponent reactions (4MCRs) e. g., to synthesis pyridazino[1,2-a]indazole, indazolo[2,1-b]phthalazine and pyrazolo[1,2-b]phthalazine. This green method has several advantages such as short reaction time, using simple methods to prepare catalysts and products, easy operation and high efficiency of products. In addition, the catalyst can be easily recovered and reused several times with reduced average activity.
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Affiliation(s)
- Najmeh Amirmahani
- Department of Chemistry, University of Guilan, University Campus 2, Rasht, Iran.,Environmental Health Engineering Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Nosrat O Mahmoodi
- Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran.
| | - Mohammad Malakootian
- Environmental Health Engineering Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Abbas Pardakhty
- Pharmaceutics Research Center, Neuropharmacology Institute, Kerman University of Medical Sciences, Kerman, Iran
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Raj V, Lee J. 2H/4H-Chromenes-A Versatile Biologically Attractive Scaffold. Front Chem 2020; 8:623. [PMID: 32850645 PMCID: PMC7419998 DOI: 10.3389/fchem.2020.00623] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 06/15/2020] [Indexed: 12/26/2022] Open
Abstract
2H/4H-chromene (2H/4H-ch) is an important class of heterocyclic compounds with versatile biological profiles, a simple structure, and mild adverse effects. Researchers discovered several routes for the synthesis of a variety of 2H/4H-ch analogs that exhibited unusual activities by multiple mechanisms. The direct assessment of activities with the parent 2H/4H-ch derivative enables an orderly analysis of the structure-activity relationship (SAR) among the series. Additionally, 2H/4H-ch have numerous exciting biological activities, such as anticancer, anticonvulsant, antimicrobial, anticholinesterase, antituberculosis, and antidiabetic activities. This review is consequently an endeavor to highlight the diverse synthetic strategies, synthetic mechanism, various biological profiles, and SARs regarding the bioactive heterocycle, 2H/4H-ch. The presented scaffold work compiled in this article will be helpful to the scientific community for designing and developing potent leads of 2H/4H-ch analogs for their promising biological activities.
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Affiliation(s)
- Vinit Raj
- School of Chemical Engineering, Yeungnam University, Gyeongsan-si, South Korea
| | - Jintae Lee
- School of Chemical Engineering, Yeungnam University, Gyeongsan-si, South Korea
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