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Ghoneim MM, Abdelgawad MA, Elkanzi NAA, Bakr RB. Review of the recent advances of pyrazole derivatives as selective COX-2 inhibitors for treating inflammation. Mol Divers 2025; 29:1789-1820. [PMID: 39014146 DOI: 10.1007/s11030-024-10906-9] [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: 02/09/2024] [Accepted: 05/30/2024] [Indexed: 07/18/2024]
Abstract
Pyrazole heterocycle is regarded as an extremely significant agent for the therapy of inflammation. Celecoxib, lonazolac, deracoxib, and phenylbutazone are examples of commercially approved pyrazole drugs with COX-2 inhibitory potential for curing inflammation. There have been recently many reviews for the biological significance of pyrazole derivatives. This review talks about pyrazole derivatives with anti-inflammatory activity and also sheds the light on the recent updates on pyrazole research with an emphasis on some synthetic pathways utilized to construct this privileged scaffold and structure activity relationship that accounts for the anti-inflammatory activity in an attempt to pave the opportunity for medicinal chemists to develop novel anti-inflammatory agents with better COX-2 selectivity.
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Affiliation(s)
- Mohammed M Ghoneim
- Department of Pharmacy Practice, College of Pharmacy, AlMaarefa University, Ad Diriyah, 13713, Saudi Arabia
| | - Mohamed A Abdelgawad
- Department of Pharmaceutical Chemistry, College of Pharmacy, Jouf University, Sakaka, 72388, Saudi Arabia.
| | - Nadia A A Elkanzi
- Chemistry Department, College of Science, Jouf University, P.O. Box: 2014, Sakaka, Saudi Arabia
| | - Rania B Bakr
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Beni-Suef University, 62514, Beni-Suef, Egypt.
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2
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Ghaith EA, Zoorob HH, Hamama WS. Synthesis, Antimicrobial Evaluation, DFT, and Molecular Docking Studies of Pyrano [4,3-b] Pyranone and Pyrano[2,3-b]Pyridinone Systems. Chem Biodivers 2024; 21:e202400243. [PMID: 38462494 DOI: 10.1002/cbdv.202400243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 03/08/2024] [Accepted: 03/08/2024] [Indexed: 03/12/2024]
Abstract
Dehydroacetic acid (DHA) was utilized as a fundamental precursor in the synthesis of novel pyrano [4,3-b] pyran and pyrano [2,3-b] pyridine systems. Whereas, a new series of fused polyheteronuclear systems was achieved through the reaction of DHA with active methylene compounds such as malononitrile and pyrazolone. Whereas, the treatment of DHA 1 with cyclic ketones involving cyclohexanone and cyclododecanone afforded annulated tricyclic system 6 and spiro hybrid molecule 7. Also, the reaction of DHA 1 with cyanoacetamide derivatives 8 and 11 yielded their corresponding novel pyrano [2,3-b] pyridine-6-carbonitrile frameworks 9 and 12, respectively. Also, in silico predictive theoretical molecular docking studies for bioactive synthesized scaffolds against both HER2 and 6BBP displayed an optimistic result for compounds 2 b, 5, 9, and 12 highlighting their expediency as up-and-coming candidates for future preclinical trials. Additionally, all compounds were assessed as antibacterial agents against various types of four candidates of bacteria in the presence of ampicillin as a reference. Notably, compounds 6, 7, and 12 showed promising antibacterial potential against Bacillus subtilis with activity indexes (69.6, 91.3, and 82.6 %), respectively.
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Affiliation(s)
- Eslam A Ghaith
- Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, 35516, Egypt
| | - Hanafi H Zoorob
- Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, 35516, Egypt
| | - Wafaa S Hamama
- Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, 35516, Egypt
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Bashkar M, Bavadi M, Ghaderi E, Niknam K. Synthesis of mono- and bis-spirooxindole derivatives "on water" using double salt of aluminum sulfate-sulfuric acid as a reusable catalyst. Mol Divers 2021; 25:2001-2015. [PMID: 32356162 DOI: 10.1007/s11030-020-10091-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Accepted: 02/26/2020] [Indexed: 10/24/2022]
Abstract
The preparation of double salt of aluminum sulfate-sulfuric acid (Al4(SO4)6·(H2SO4)·24H2O) by the reaction of aluminum sulfate and sulfuric acid in water is described. Aluminum sulfate-sulfuric acid is characterized via some spectroscopic and microscopic techniques such as infrared spectroscopy (IR), X-ray diffraction spectroscopy (XRD), energy-dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) which corroborated the structure of the double salt. This double salt is soluble in water and insoluble in organic solvents. It was employed as a new catalyst for the synthesis of spirooxindole compounds on water with good to excellent yields. The double salt could be recycled and reused without appreciable loss of activity.
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Affiliation(s)
- Mohammad Bashkar
- Department of Chemistry, Faculty of Sciences, Persian Gulf University, 75169, Bushehr, Iran
| | - Masoumeh Bavadi
- Department of Chemistry, Faculty of Sciences, Persian Gulf University, 75169, Bushehr, Iran
| | - Esmali Ghaderi
- Chemistry Department, Bu-Ali Sina University, Hamadan, Iran
| | - Khodabakhsh Niknam
- Department of Chemistry, Faculty of Sciences, Persian Gulf University, 75169, Bushehr, Iran.
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Mustafa A, Siddiqui S, Umar Khan M, Qasem Ali AA, Siddiqui ZN. Recent Advances in Synthesis of Pyrazole Derivatives using Functionalized Catalysts Immobilized on Silica. ChemistrySelect 2021. [DOI: 10.1002/slct.202100688] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Atif Mustafa
- Department of Chemistry Aligarh Muslim University Aligarh 202002, Uttar Pradesh India
| | - Shaheen Siddiqui
- Department of Chemistry Aligarh Muslim University Aligarh 202002, Uttar Pradesh India
| | - Mohd Umar Khan
- Department of Chemistry Aligarh Muslim University Aligarh 202002, Uttar Pradesh India
| | | | - Zeba N. Siddiqui
- Department of Chemistry Aligarh Muslim University Aligarh 202002, Uttar Pradesh India
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Chanu LV, Singh OM. Recent progress in the synthesis of azoles and related five‐membered ring heterocycles using silica‐supported heterogeneous catalysts. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Singh R, Kaur R, Ahlawat P, Kaushik P, Singh K. Green Methods for the Synthesis of Pyrazoles: A Review. ORG PREP PROCED INT 2021. [DOI: 10.1080/00304948.2021.1904750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Raman Singh
- Department of Chemistry, Maharishi Markandeshwar (Deemed to be University) Mullana, Haryana, India
| | - Rajneesh Kaur
- Department of Chemistry, Maharishi Markandeshwar (Deemed to be University) Mullana, Haryana, India
| | - Priyanka Ahlawat
- Department of Chemistry, Maharishi Markandeshwar (Deemed to be University) Mullana, Haryana, India
| | - Parul Kaushik
- Department of Chemistry, Maharishi Markandeshwar (Deemed to be University) Mullana, Haryana, India
| | - Kuldeep Singh
- Department of Chemistry, Maharishi Markandeshwar (Deemed to be University) Mullana, Haryana, India
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Kumar MS, Sriram YH, Venkateswarlu M, Rajanna KC, Sudhakar MS, Venkanna P, Saiprakash PK. Silica-supported perchloric acid and potassium bisulfate as reusable green catalysts for nitration of aromatics under solvent-free microwave conditions. SYNTHETIC COMMUN 2017. [DOI: 10.1080/00397911.2017.1387923] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- M. Satish Kumar
- Department of Chemistry, Osmania University, Hyderabad, Telangana, India
| | - Y. Hemanth Sriram
- Department of Chemistry, Osmania University, Hyderabad, Telangana, India
| | - M. Venkateswarlu
- Department of Chemistry, Osmania University, Hyderabad, Telangana, India
| | - K. C. Rajanna
- Department of Chemistry, Osmania University, Hyderabad, Telangana, India
| | - M. Sai Sudhakar
- Department of Chemistry, BITS Pilani, Hyderabad, Telangana, India
| | - Purugula Venkanna
- Department of Chemistry, Osmania University, Hyderabad, Telangana, India
| | - P. K. Saiprakash
- Department of Chemistry, Osmania University, Hyderabad, Telangana, India
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Mulokwe P, Marakalala MB, Mabasa TF, Kinfe HH. NaHSO4–SiO2-catalyzed aza-Diels–Alder reaction of o-hydroxybenzaldimines with 2,3-dihydrofuran: Diastereoselective synthesis of furanobenzopyrans. SYNTHETIC COMMUN 2017. [DOI: 10.1080/00397911.2017.1377257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Pfanelo Mulokwe
- Department of Chemistry, Research Centre for Synthesis and Catalysis, University of Johannesburg, Johannesburg, South Africa
| | - Mokgethwa B. Marakalala
- Department of Chemistry, Research Centre for Synthesis and Catalysis, University of Johannesburg, Johannesburg, South Africa
| | - Tommy F. Mabasa
- Department of Chemistry, Research Centre for Synthesis and Catalysis, University of Johannesburg, Johannesburg, South Africa
| | - Henok H. Kinfe
- Department of Chemistry, Research Centre for Synthesis and Catalysis, University of Johannesburg, Johannesburg, South Africa
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Yan CX, Ding JF, Ma TL, Shao R, Xu W, He J, Wang PF. Dehydration of Castor Oil over NaHSO4
/MCM-41 Catalyst Modified by n
-Dodecyltriethoxysilane. Z Anorg Allg Chem 2017. [DOI: 10.1002/zaac.201700066] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Cui-Xia Yan
- School of Chemical Engineering; Anhui University of Science and Technology; 232001 Huainan P. R. China
- School of Chemistry and Chemical Engineering; Yancheng Institute of Technology; 224051 Yancheng P. R. China
| | - Jian-Fei Ding
- School of Chemistry and Chemical Engineering; Yancheng Institute of Technology; 224051 Yancheng P. R. China
| | - Tian-Lin Ma
- School of Chemistry and Chemical Engineering; Yancheng Institute of Technology; 224051 Yancheng P. R. China
- College of Chemistry and Chemical Engineering; Nanjing Tech University; 210009 Nanjing P. R. China
| | - Rong Shao
- School of Chemistry and Chemical Engineering; Yancheng Institute of Technology; 224051 Yancheng P. R. China
| | - Wei Xu
- School of Chemistry and Chemical Engineering; Yancheng Institute of Technology; 224051 Yancheng P. R. China
| | - Jie He
- School of Chemical Engineering; Anhui University of Science and Technology; 232001 Huainan P. R. China
| | - Peng-Fei Wang
- State Key Laboratory of Coal Conversion; Institute of Coal Chemistry, Chinese Academy of Sciences; 030001 Taiyuan P. R. China
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Aggarwal R, Walia S, Rani C. Dehydroacetic Acid and Its Derivatives as Starting Synthons for Synthesis of Heterocyclic Compounds. HETEROCYCLES 2017. [DOI: 10.3987/rev-17-860] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Tarannum S, Siddiqui ZN. Lanthanum immobilized on chitosan: a highly efficient heterogeneous catalyst for facile synthesis of novel (α,β-unsaturated) β-aminoketones. Appl Organomet Chem 2016. [DOI: 10.1002/aoc.3457] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Saima Tarannum
- Department of Chemistry; Aligarh Muslim University; Aligarh 202002 India
| | - Zeba N. Siddiqui
- Department of Chemistry; Aligarh Muslim University; Aligarh 202002 India
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Synthesis, in-vitro antibacterial, antifungal, and molecular modeling of potent anti-microbial agents with a combined pyrazole and thiophene pharmacophore. Molecules 2015; 20:8712-29. [PMID: 26007175 PMCID: PMC6272790 DOI: 10.3390/molecules20058712] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2015] [Accepted: 05/11/2015] [Indexed: 11/28/2022] Open
Abstract
Ethyl 5-acetyl-4-methyl-2-(phenylamino)thiophene-3-carboxylate (2) and there derivatives 3a–c, 4, 6a–c and 9a–f were synthesized. The structure of compound 2 was deduced by 1H-NMR, 13C-NMR, FT-IR, MS, microanalysis, and single-crystal X-ray crystallography. The compound crystallized in the monoclinic system, with space group P21/c and cell coordinates a = 8.5752(16) Å, b = 21.046(4) Å, c = 8.2941(12) Å, β = 101.131(6)°, V = 1468.7(4) Å3, and Z = 4. Compounds 2, 3a–c, 4, 5a–c and 9a–f were subjected into in vitro antimicrobial activity tests. Compounds 3a and 3c were more potent than standard drug amphotericin B, showing MIC values of 23.8 ± 0.42 and 24.3 ± 0.68, respectively, against Aspergillus fumigatus while the standard drug MIC was 23.7 ± 0.1. Compound 3c was also more potent (MIC 24.8 ± 0.64) than the standard drug amphotericin B (MIC 19.7 ± 0.2) against Syncephalastrum racemosum. Compounds 4 and 9f also showed promising anti-microbial activity. Molecular modeling was performed for the most active compounds.
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Mabkhot YN, Aldawsari FD, Al-Showiman SS, Barakat A, Soliman SM, Choudhary MI, Yousuf S, Mubarak MS, Hadda TB. Novel enaminone derived from thieno [2,3-b] thiene: Synthesis, x-ray crystal structure, HOMO, LUMO, NBO analyses and biological activity. Chem Cent J 2015; 9:24. [PMID: 26064187 PMCID: PMC4461800 DOI: 10.1186/s13065-015-0100-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2014] [Accepted: 04/23/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Due to their structural and therapeutic diversity, thienothiophene derivatives have attracted much synthetic interest because of their reactivity and biological activity. The thieno [2,3-b] thiophene moiety has been used in the design of a novel pharmaceutical therapies. Additionally, its enaminones derivatives are versatile synthons and have a lot of synthetic applications such as N-heterocycles, wide variety of naturally occurring alkaloids and pharmaceutical drugs. RESULTS Synthesis of (2E,2'E)-1,1'-(3,4-diphenylthieno [2,3-b] thiophene-2,5-diyl) bis (3-(dimethylamino) prop-2-en-1-one) 5 was reported. The structure of compound 5 was deduced by spectroscopic techniques. The compound was crystallizes in the monoclinic system with space group P-1 with cell coordinates a=9.9685 (8) Å, b=10.1382 (8) Å, c=13.3220 (11) Å, α=101.018 (2) °, β=94.480 (2) °, γ=107.207 (1) °, V=1249.3 (1) Å3, and Z=2. In the crystal molecules are packed in chains formed via weak intermolecular C21-H21A… O1, C22-H22A…O2 and C27-H27A…O2 hydrogen bondings. Theoretical quantum chemical calculations have been performed on the studied compound using the DFT B3LYP/6-311G (d, p) method. The geometric parameters of the optimized structure are in good agreement with the experimental data obtained from our reported X-ray structure. The two benzene rings and the two side chains are not coplanar with the fused thiophene rings. The electronic spectra of the studied compound have been calculated using the TD-DFT method at the same level of theory. The transition bands at 352.9 nm (f=0.5549) and 332.1 nm (f=0.2190) are due to the H-1 → L (72%) and H → L + 1 (82%) excitations respectively. The NBO calculations were performed to predict the natural atomic charges at the different atomic sites and to study the different intramolecular charge transfer (ICT) interactions occurring in the studied system. It is found that the O and N-atoms have the highest negative charge densities while the S-atoms are the most electropositive. These results give idea about how our molecule could react with the receptor active sites. Compound 5 was evaluated against ant-microbial activity. CONCLUSIONS Synthesis, molecular structure and spectroscopic invesitgation of (2E,2'E)-1,1'-(3,4-diphenylthieno [2,3-b] thiophene-2,5-diyl) bis (3- (dimethylamino) prop-2-en-1-one) 5 was studied. Graphical AbstractMolecular structure investigation of novel enaminone derived from thieno [2,3-b] thiene.
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Affiliation(s)
- Yahia Nasser Mabkhot
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh, 11451 Saudi Arabia
| | - Fahad D Aldawsari
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh, 11451 Saudi Arabia ; King Abdulaziz City for Science and Technology, P. O. Box 6086, Riyadh, 11442 Saudi Arabia
| | - Salem S Al-Showiman
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh, 11451 Saudi Arabia
| | - Assem Barakat
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh, 11451 Saudi Arabia ; Department of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426, Alexandria, Ibrahimia 21321 Egypt
| | - Saied M Soliman
- Department of Chemistry, Rabigh College of Science and Art, King Abdulaziz University, P O Box 344, Rabigh, 21911 Saudi Arabia ; Department of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426, Alexandria, Ibrahimia 21321 Egypt
| | - M Iqbal Choudhary
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh, 11451 Saudi Arabia ; H.E.J. Research Institute of Chemistry, International Center for Chemical Sciences, University of Karachi, Karachi, 75270 Pakistan
| | - Sammer Yousuf
- H.E.J. Research Institute of Chemistry, International Center for Chemical Sciences, University of Karachi, Karachi, 75270 Pakistan
| | | | - Taibi Ben Hadda
- Laboratoire Chimie Matériaux, FSO, Université Mohammed 1ER, Oujda, 60000 Morocco
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Ahmed N, Siddiqui ZN. Mesoporous alumina sulphuric acid: A novel and efficient catalyst for on-water synthesis of functionalized 1,4-dihydropyridine derivatives via β-enaminones. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2014.07.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Sulphated silica tungstic acid as a highly efficient and recyclable solid acid catalyst for the synthesis of tetrahydropyrimidines and dihydropyrimidines. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2014.02.019] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Khan T, Siddiqui ZN. Perchloric acid modified-cellulose: a versatile, novel and biodegradable heterogeneous solid acid catalyst for single-pot synthesis of novel bis-pyran annulated heterocyclic scaffolds under solvent-free conditions. NEW J CHEM 2014. [DOI: 10.1039/c4nj00529e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An eco-friendly synthesis of novel bis-pyran annulated heterocyclic scaffolds (4a–r) and pyran annulated heterocyclic scaffolds (4s–u) using cellulose-HClO4as a biodegradable catalyst is described.
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Affiliation(s)
- Tabassum Khan
- Department of Chemistry
- Aligarh Muslim University
- Aligarh, 202002, India
| | - Zeba N. Siddiqui
- Department of Chemistry
- Aligarh Muslim University
- Aligarh, 202002, India
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Siddiqui ZN, Ahmed N. NH2SO3H-SiO2as a new water-compatible, recyclable heterogeneous catalyst for the synthesis of novel (α,β-unsaturated) β-amino ketones via aza-Michael reaction. Appl Organomet Chem 2013. [DOI: 10.1002/aoc.3031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zeba N. Siddiqui
- Department of Chemistry; Aligarh Muslim University; Aligarh; 202 002; India
| | - Nayeem Ahmed
- Department of Chemistry; Aligarh Muslim University; Aligarh; 202 002; India
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Highly efficient solvent-free synthesis of novel pyranyl pyridine derivatives via β-enaminones using ZnO nanoparticles. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.04.072] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Siddiqui ZN, Khan T. Sulfuric acid-modified PEG-6000 (PEG–OSO3H): a biodegradable, reusable solid acid catalyst for highly efficient and eco-friendly synthesis of novel bis-Knoevenagel products under solvent-free conditions. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.05.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Siddiqui ZN. Bis[(L)prolinato-N,O]Zn–water: A green catalytic system for the synthesis of 3,4-dihydropyrimidin-2 (1H)-ones via the Biginelli reaction. CR CHIM 2013. [DOI: 10.1016/j.crci.2012.10.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Siddiqui ZN, Khan K. Friedlander synthesis of novel benzopyranopyridines in the presence of chitosan as heterogeneous, efficient and biodegradable catalyst under solvent-free conditions. NEW J CHEM 2013. [DOI: 10.1039/c3nj00069a] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Siddiqui ZN, Khan T. P2O5/SiO2 as an efficient heterogeneous catalyst for the synthesis of heterocyclic alkene derivatives under thermal solvent-free conditions. Catal Sci Technol 2013. [DOI: 10.1039/c3cy00095h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Aoyama T, Koda S, Takeyoshi Y, Ito T, Takido T, Kodomari M. A novel efficient method for the synthesis of substituted olefins; cross coupling of two different alcohols using NaHSO4/SiO2. Chem Commun (Camb) 2013; 49:6605-7. [DOI: 10.1039/c3cc42746c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Chu XQ, Wang SY, Ji SJ. Recyclable NaHSO4 catalyzed alkylation of tert-enamides with indoles or amines in water: facile construction of pharmaceutically analogous bis-alkaloid scaffolds. RSC Adv 2013. [DOI: 10.1039/c3ra40833g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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