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Khalilzadeh M, Saberi S, Noori G, Vaziri M, Sepehri S, Bakherad H, Esmaeili-Fallah M, Mirzayi S, Farhadi G. Synthesis, biological assessment, and computational investigations of nifedipine and monastrol analogues as anti-leishmanial major and anti-microbial agents. Mol Divers 2023; 27:2555-2575. [PMID: 36417095 DOI: 10.1007/s11030-022-10569-4] [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: 09/01/2022] [Accepted: 11/11/2022] [Indexed: 11/24/2022]
Abstract
Leishmaniasis includes a range of parasitic diseases caused by numerous types of the protozoan kinetoplastid parasite. Fungal and bacterial pathogens have led to infectious illnesses causing some main public health problem in current years. A series of dihydropyridine and tetrahydropyrimidine derivatives having fluoro, bromo, and nitro substituents at para-phenyl ring on C4 of dihydropyridine and tetrahydropyrimidine rings were synthesized. Then, anti-leishmanial and antimicrobial potencies of compounds were assessed. All compounds were synthesized via Hantzsch and Biginelli reactions. All derivatives were evaluated for their anti-leishmanial and antimicrobial activities. Moreover, docking and molecular dynamics simulation calculations of the compounds in PRT1 binding site were performed to report the results of anti-leishmanial and antimicrobial activities. Compounds 4a and 4b showed the highest anti-amastigote and anti-promastigote activities. Compound 4a revealed the highest antimicrobial activity against E. coli, P. aeruginosa, and C. albicans strains. In addition, compound 4c showed the highest activity against S. aureus. The fluoro, bromo, and nitro substituents in para-position of phenyl group at C4 of dihydropyridine and tetrahydropyrimidine moieties as well as the bulk and length of the chain linking to the ester moieties are essential for anti-leishmanial and anti-microbial activities of these derivatives. Low cytotoxicity was shown by most of derivatives against macrophages. The molecular docking studies were in agreement with in vitro assay. Moreover, hydrogen binds, RMSF, RMSD, and Rg, strongly showed the steady binding of 4a and 4b compounds in PRT1 active site.
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Affiliation(s)
- Mahdieh Khalilzadeh
- Department of Medicinal Chemistry, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Sedigheh Saberi
- Department of Mycology and Parasitology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ghazal Noori
- Department of Medicinal Chemistry, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Mostafa Vaziri
- Department of Medicinal Chemistry, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Saghi Sepehri
- Department of Medicinal Chemistry, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran.
- Pharmaceutical Sciences Research Center, Ardabil University of Medical Sciences, Ardabil, Iran.
| | - Hamid Bakherad
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mahsa Esmaeili-Fallah
- Department of Mycology and Parasitology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Sahar Mirzayi
- Department of Medicinal Chemistry, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Ghazaleh Farhadi
- Department of Medicinal Chemistry, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran
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2
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Guda MR, Zyryanov GV, Dubey A, Munagapati VS, Wen JC. Cytotoxic and Infection-Controlled Investigations of Novel Dihydropyridine Hybrids: An Efficient Synthesis and Molecular-Docking Studies. Pharmaceuticals (Basel) 2023; 16:1159. [PMID: 37631073 PMCID: PMC10460068 DOI: 10.3390/ph16081159] [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: 07/09/2023] [Revised: 07/29/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023] Open
Abstract
A sequence of novel 1,4-dihydropyridines (DHP) and their hybrids was developed using a multicomponent strategy under environmentally benign conditions. In addition, computational studies were performed, and the ligand-protein interactions calculated in different bacteria and two fungal strains. Para-hydroxy-linked DHP (5f) showed the best binding energies of 3.591, 3.916, 8.499 and 6.895 kcal/mol against various pathogens used and other substances received a good docking score. The pathogen resistance potential of the synthesized targets against four bacteria and two fungi showed that whole DHP substances exhibit different levels of resistance to each microorganism. Gram-positive bacteria, which are highly sensitive to all molecules, and the MTCC-1884-encoded fungus strongly rejected the studied compounds compared to comparator drugs. In particular, the 5f candidate showed remarkable antimicrobial activity, followed by the substances 5a, 5b, 5j, 5k and 5l. Furthermore, MIC and MBC/MFC properties showed that 5f had a minimum bacterial concentration of 12.5 μg/mL against E. coli and against two fungal pathogens, with its killing activity being effective even at low concentrations. On the other hand, whole motifs were tested for their cytotoxic activity, revealing that the methoxy and hydroxy-linked compounds (5h) showed greater cytotoxic potency, followed by the two hydroxy linked compounds (5d and 5f). Overall, this synthetic approach used represents a prototype for future nature-favored synthesis methods and these biological results serve as a guide for future therapeutic drug research. However, the computer results play an important role in the further development of biological experiments.
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Affiliation(s)
- Mallikarjuna R. Guda
- Institute of Chemical Engineering, Ural Federal University Named after the First President of Russia B.N. Yeltsin, 28 Mira St., Yekaterinburg 620002, Russia;
- Department of Chemistry, Sri Venkateswara University, Tirupati 517502, India
| | - Grigory. V. Zyryanov
- Institute of Chemical Engineering, Ural Federal University Named after the First President of Russia B.N. Yeltsin, 28 Mira St., Yekaterinburg 620002, Russia;
- Ural Division of the Russian Academy of Sciences, I. Ya. Postovskiy Institute of Organic Synthesis, 22 S. Kovalevskoy Street, Yekaterinburg 620219, Russia
| | - Amit Dubey
- Computational Chemistry and Drug Discovery Division, Quanta Calculus Pvt. Ltd., Greater Noida 201310, India
- Department of Pharmacology, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Chennai 600077, India
| | - Venkata Subbaiah Munagapati
- Research Centre for Soil and Water Resources and Natural Disaster Prevention (SWAN), National Yunlin University of Science and Technology, Douliou 64002, Taiwan
| | - Jet-Chau Wen
- Research Centre for Soil and Water Resources and Natural Disaster Prevention (SWAN), National Yunlin University of Science and Technology, Douliou 64002, Taiwan
- Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology, Douliou 64002, Taiwan
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A review of synthetic methods of 1,2,4-triazolopyridines and their therapeutic properties. RESULTS IN CHEMISTRY 2023. [DOI: 10.1016/j.rechem.2023.100782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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4
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Thorat NM, Khodade VS, Ingale AP, Lokwani DK, Sarkate AP, Thopate SR. Molecular Docking Studies and Application of 6-(1-Arylmethanamino)-2-Phenyl-4 H-Chromen-4-Ones as Potent Antibacterial Agents. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2150238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Nitin M. Thorat
- Department of Chemistry, Maharaja Jivajirao Shinde Arts, Science, Commerce College, Shrigonda, India
| | - Vinnayak S. Khodade
- Department of Chemistry, Johns Hopkins University Baltimore, Baltimore, MD, USA
| | - Ajit P. Ingale
- Department of Chemistry, Dada Patil College, Karjat, India
| | - Deepak K. Lokwani
- Department of Pharmaceutical Chemistry, Rajarshi Shahu College of Pharmacy, Buldana, India
| | - Aniket P. Sarkate
- Department of Chemical Technology, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, India
| | - Shankar R. Thopate
- Department of Chemistry, Radhabai Kale Mahila Mahavidyalaya Ahmednagar, Ahmednagar, India
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5
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Soares LTXMG, Basso MAF, Dos Santos CMR, Ali A, Vasconcelos LG, Dall'Oglio EL, Sampaio OM, Vieira LCC. Binding Properties of Photosynthetic Herbicides: Photosynthetic Activity and Molecular Docking Approach towards 1,4-Dihydropyridines Derivatives. Chem Biodivers 2022; 19:e202200586. [PMID: 36383100 DOI: 10.1002/cbdv.202200586] [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: 06/17/2022] [Revised: 11/14/2022] [Accepted: 11/15/2022] [Indexed: 11/17/2022]
Abstract
In the current work, we describe the synthesis of 1,4-dihydropyridine (1,4-DHP) derivatives via Hantzsch multicomponent reaction and their evaluation as photosystem II (PSII) inhibitors through chlorophyll a fluorescence bioassay. Among all the compounds tested, 1,1'-(2,4,6-trimethyl-1,4-dihydropyridine-3,5-diyl)bis(ethan-1-one) (4b) showed best results, reducing the parameters performance index on absorption basis (PIabs ) and electron transport per reaction center by 61 % and 49 %, respectively, as compared to the control. These results indicate the inhibitory activity of PSII over the electron transport chain. Additionally, a molecular docking approach using the protein D1 (PDB code 4V82) was performed in order to assess the structure-activity relationship among the 1,4-DHP derivatives over the PSII, which revealed that both, size of the group at position 4 and the carbonyl groups at the dihydropyridine ring are important for the ligand's interaction, particularly for the hydrogen-bonding interaction with the residues His215, Ser264, and Phe265. Thus, the optimization of these molecular features is the aim of our research group to extend the knowledge of PSII electron chain inhibitors and the establishment of new potent bioactive molecular scaffolds.
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Affiliation(s)
- Luís T X M G Soares
- Department of Chemistry, Federal University of Mato Grosso, Cuiabá-MT, 78060-900, Brazil
| | - Marcelo A F Basso
- Department of Chemistry, Federal University of Mato Grosso, Cuiabá-MT, 78060-900, Brazil
| | - Clarice M R Dos Santos
- Engineering Faculty, Federal University of Mato Grosso, Várzea Grande-MT, 78060-900, Brazil
| | - Akbar Ali
- Department of Chemistry, Government College University, Faisalabad, 38000, Pakistan
| | - Leonardo G Vasconcelos
- Department of Chemistry, Federal University of Mato Grosso, Cuiabá-MT, 78060-900, Brazil
| | - Evandro L Dall'Oglio
- Department of Chemistry, Federal University of Mato Grosso, Cuiabá-MT, 78060-900, Brazil
| | - Olívia M Sampaio
- Department of Chemistry, Federal University of Mato Grosso, Cuiabá-MT, 78060-900, Brazil
| | - Lucas C C Vieira
- Department of Chemistry, Federal University of Mato Grosso, Cuiabá-MT, 78060-900, Brazil
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Kumar R, Kumar D, Upadhyay RK, Deswal N, Takkar P, Kareem A, Kumar V, Kumar LS. Design, Synthesis, Antimicrobial Screening and Docking Studies of Newer 1,4‐Dihydropyridine tethered Chalcone Hybrids. ChemistrySelect 2022. [DOI: 10.1002/slct.202202928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rakesh Kumar
- Department of Chemistry Bio-organic Laboratory University of Delhi Delhi 110007
| | - Dhiraj Kumar
- IndiaDepartment of Chemistry Bio-organic Laboratory Kirori Mal College University of Delhi Delhi 110 007 India
| | | | - Nidhi Deswal
- Department of Chemistry Bio-organic Laboratory University of Delhi Delhi 110007
| | - Priya Takkar
- Department of Chemistry Bio-organic Laboratory University of Delhi Delhi 110007
| | | | - Vinod Kumar
- Department of Microbiology University of Delhi, South Campus Benito Juarez Marg Delhi 110021 India
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7
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Stalinskaya AL, Martynenko NV, Alkhimova LE, Dilbaryan DS, Vasilchenko AS, Dengis NA, Vlasenko VS, Kulakov IV. Synthesis and bacteriostatic properties of epoxybenzooxocino[4,3-b]pyridine derivatives. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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8
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Akbar I, Radhakrishnan S, Meenakshisundaram K, Manilal A, Hatamleh AA, Alnafisi BK, Ahamed A, Balasubramani R. Design of 1,4-Dihydropyridine Hybrid Benzamide Derivatives: Synthesis and Evaluation of Analgesic Activity and Their Molecular Docking Studies. Drug Des Devel Ther 2022; 16:4021-4039. [DOI: 10.2147/dddt.s357604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Accepted: 11/02/2022] [Indexed: 11/22/2022] Open
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9
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A P, Makam P. 1,4-Dihydropyridine: synthetic advances, medicinal and insecticidal properties. RSC Adv 2022; 12:29253-29290. [PMID: 36320730 PMCID: PMC9555063 DOI: 10.1039/d2ra04589c] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 09/21/2022] [Indexed: 11/07/2022] Open
Abstract
1,4-Dihydropyridine (1,4-DHP) is one of the foremost notable organic scaffolds with diverse pharmaceutical applications. This study will highlight recent accomplishments in the construction of 1,4-DHP with structural and functional modifications using multi-component one-pot and green synthetic methodologies. The various intrinsic therapeutic applications, ranging from calcium channel blocker, anti-oxidative, anticancer, anti-inflammatory, anti-microbial, anti-hypertensive, anti-diabetic, anticoagulants, anti-cholinesterase, neuro-protective, and other miscellaneous activities, have been summarized with a focus on their structure-activity relationship (SAR) investigations. In addition, the insecticidal properties have been collated and discussed. Researchers in the fields of medicinal chemistry and drug development will find the summarized conclusions of this study incredibly informative, instructional, and valuable.
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Affiliation(s)
- Parthiban A
- Centre for Excellence on GMP Extraction Facility, National Institute of Pharmaceutical Education and Research, (NIPER) Guwahati Assam India 781101
| | - Parameshwar Makam
- Department of Chemistry, School of Applied and Life Sciences, Uttaranchal University Arcadia Grant, P. O. Chandanwari, Premnagar Dehradun Uttarakhand India 248007
- Dr Param Laboratories Phase-1, IDA, B. N. Reddy Nagar, Cherlapally Hyderabad Telangana 500051 India
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10
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Gomha SM, Riyadh SM, Farghaly TA, Haggam RA. Synthetic Utility of Bis-Aminomercapto[1,2,4] Triazoles in the Preparation of Bis- Fused Triazoles and Macrocycles. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2077773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Sobhi M. Gomha
- Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt
- Department of Chemistry, Faculty of Science, Islamic University of Madinah, Madinah, Saudi Arabia
| | - Sayed M. Riyadh
- Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt
| | - Thoraya A. Farghaly
- Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt
- Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Reda A. Haggam
- Department of Chemistry, Faculty of Science, Islamic University of Madinah, Madinah, Saudi Arabia
- Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, Egypt
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11
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Abu-Melha S, Edrees MM, Kheder NA, Saad AM, Riyadh SM, Abdel-Aziz MM, Abdelmoaz MA, Gomha SM. Synthesis and Anti-Tubercular (Tb) Evaluation of Bis[4-Ethylidineamino[1,2,4]Triazole-3-Thiol] Tethered by 1,4-Dihydropyridine. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2022. [DOI: 10.1134/s1068162022020029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Alamro FS, Al-Kadhi NS, Gomha SM, Popoola SA, Khushaim MS, Alhaddad OA, Ahmed HA. Experimental and Theoretical Investigations of Three-Ring Ester/Azomethine Materials. MATERIALS (BASEL, SWITZERLAND) 2022; 15:2312. [PMID: 35329764 PMCID: PMC8949326 DOI: 10.3390/ma15062312] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/10/2022] [Accepted: 03/18/2022] [Indexed: 12/26/2022]
Abstract
New three-ring ester/azomethine homologues series, (E)-4-((4-hydroxybenzylidene)amino)phenyl 4-(alkoxy)benzoate In, were prepared and their properties were investigated experimentally and theoretically. FT-IR, NMR, and elemental analyses were used to confirm the chemical structures of the synthesized compounds. The mesomorphic activities of the planned homologues were evaluated using differential scanning calorimetry (DSC) and polarized optical microscopy. All of the homologous examined were found to have non-mesomorphic properties. Theoretical calculations using the density functional theory (DFT) were used to validate the experimental data and determine the most stable conformation of the synthesized compounds. All calculated conformers' thermal properties, dipole moments, and polarizability were discussed. The results show that the terminal alkoxy chain length affects the thermal parameters of the conformers. The correlations between these parameters' values and the conformer type were demonstrated. The base component was expected to be in two conformers according to the orientation of the N atom of imine-linkage. DFT calculations revealed the more probable of the two possible conformers, and the incorporation of the alkoxy terminal chain in one position affect its geometrical and mesomerphic characteristics.
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Affiliation(s)
- Fowzia S. Alamro
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia; (F.S.A.); (N.S.A.-K.)
| | - Nada S. Al-Kadhi
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia; (F.S.A.); (N.S.A.-K.)
| | - Sobhi M. Gomha
- Chemistry Department, Faculty of Science, Islamic University of Madinah, Madinah 42351, Saudi Arabia;
- Department of Chemistry, Faculty of Science, Cairo University, Cairo 12613, Egypt
| | - Saheed A. Popoola
- Chemistry Department, Faculty of Science, Islamic University of Madinah, Madinah 42351, Saudi Arabia;
| | - Muna S. Khushaim
- Department of Physics, Faculty of Science, Taibah University, P.O. Box 30002, Al-Madina 41447, Saudi Arabia;
- Nanotechonolgy Center, Taibah University, P.O. Box 30002, Al-Madina 41447, Saudi Arabia
| | - Omaima A. Alhaddad
- Chemistry Department, College of Sciences, Taibah University, Madina Monawara 30002, Saudi Arabia;
| | - Hoda A. Ahmed
- Department of Chemistry, Faculty of Science, Cairo University, Cairo 12613, Egypt
- Chemistry Department, College of Sciences, Taibah University, Yanbu 30799, Saudi Arabia
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Al-Humaidi JY, Nayl AA, Abdalla MM, Gomha SM. Synthesis and Biological Activity Evaluation of Some New Coumarin Derivatives as Potent Anticonvulsant and CNS-Depressant Agents. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2050268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Jehan Y. Al-Humaidi
- Department of Chemistry, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - A. A. Nayl
- Department of Chemistry, College of Science, Jouf University, Sakaka, Kingdom of Saudi Arabia
| | | | - Sobhi M. Gomha
- Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt
- Chemistry Department, Faculty of Science, Islamic University of Madinah, Madinah, Saudi Arabia
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Alsayari A, Muhsinah AB, Asiri YI, Al-aizari FA, Kheder NA, Almarhoon ZM, Ghabbour HA, Mabkhot YN. Synthesis, Characterization, and Biological Evaluation of Some Novel Pyrazolo[5,1- b]thiazole Derivatives as Potential Antimicrobial and Anticancer Agents. Molecules 2021; 26:molecules26175383. [PMID: 34500816 PMCID: PMC8434505 DOI: 10.3390/molecules26175383] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/30/2021] [Accepted: 08/31/2021] [Indexed: 11/27/2022] Open
Abstract
The pharmacological activities of thiazole and pyrazole moieties as antimicrobial and anticancer agents have been thoroughly described in many literature reviews. In this study, a convenient synthesis of novel pyrazolo[5,1-b]thiazole-based heterocycles was carried out. The synthesized compounds were characterized by IR, 1H and 13C NMR spectroscopy and mass spectrometry. Some selected examples were screened and evaluated for their antimicrobial and anticancer activities and showed promising results. These products could serve as leading compounds in the future design of new drug molecules.
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Affiliation(s)
- Abdulrhman Alsayari
- Department of Pharmacognosy, College of Pharmacy, King Khalid University, Abha 61441, Saudi Arabia; (A.A.); (A.B.M.)
| | - Abdullatif Bin Muhsinah
- Department of Pharmacognosy, College of Pharmacy, King Khalid University, Abha 61441, Saudi Arabia; (A.A.); (A.B.M.)
| | - Yahya I. Asiri
- Department of Pharmacology, College of Pharmacy, King Khalid University, Abha 61441, Saudi Arabia;
| | - Faiz A. Al-aizari
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; (F.A.A.-a.); (Z.M.A.)
- Department of Chemistry, Faculty of Science, Al-Baydha University, Albaydah 38018, Yemen
| | - Nabila A. Kheder
- Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt;
| | - Zainab M. Almarhoon
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; (F.A.A.-a.); (Z.M.A.)
| | - Hazem A. Ghabbour
- Department of Medicinal Chemistry, Faculty of Pharmacy, University of Mansoura, Mansoura 35516, Egypt;
| | - Yahia N. Mabkhot
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Khalid University, Abha 61441, Saudi Arabia
- Correspondence: ; Tel.: +966-1724-19734
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Alamro FS, Ahmed HA, Gomha SM, Shaban M. Synthesis, Mesomorphic, and Solar Energy Characterizations of New Non-Symmetrical Schiff Base Systems. Front Chem 2021; 9:686788. [PMID: 34540796 PMCID: PMC8448195 DOI: 10.3389/fchem.2021.686788] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 07/08/2021] [Indexed: 11/13/2022] Open
Abstract
New asymmetrical Schiff base series based on lateral methoxy group in a central core, (E)-3-methoxy-4-(((4-methoxyphenyl)imino)methyl)phenyl 4-alkoxybenzoate (An), were synthesized and their optical and mesomorphic characteristics were investigated. The lateral OCH3group was inserted in the central ring in ortho position with respect to the azomethine linkage. FT-IR, and NMR spectroscopy as well as elemental analyses were used to elucidate their molecular structures. Their mesomorphic behaviors were characterized by polarized optical microscopy (POM) and differential scanning calorimetry (DSC). These examinations indicated that all the designed series were monomorphic and possessed nematic (N) mesophase enantiotropically, except A12 derivative which exhibited monotropic N phase. A comparative study was made between the present investigated series (An) and their corresponding isomers (Bn). The results revealed that the kind and stability of the mesophase as well as its temperature range are affected by the location and special orientation of the lateral methoxy group electric-resistance, conductance, energy-gap, and Urbach-energy were also reported for the present investigated An series. These results revealed that all electrodes exhibit Ohmic properties and electric-resistances in the GΩ range, whereas the electric resistance was decreased from 221.04 to 44.83 GΩ by lengthening the terminal alkoxy-chain to n = 12. The band gap of the An series was reduced from 3.43 to 2.89 eV by increasing the terminal chain length from n = 6 to n = 12 carbons. Therefore, controlling the length of the terminal chain can be used to improve the An series' electric conductivity and optical absorption, making it suitable for solar energy applications.
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Affiliation(s)
- Fowzia S. Alamro
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Hoda A. Ahmed
- Department of Chemistry, Faculty of Science, Cairo University, Cairo, Egypt
- Chemistry Department, College of Sciences Yanbu, Taibah University, Yanbu, Saudi Arabia
| | - Sobhi M. Gomha
- Department of Chemistry, Faculty of Science, Cairo University, Cairo, Egypt
- Chemistry Department, Faculty of Science, Islamic University of Madinah, Almadinah-Almonawara, Saudi Arabia
| | - Mohamed Shaban
- Nanophotonics and Applications Labs, Department of Physics, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
- Department of Physics, Faculty of Science, Islamic University of Madinah, Al-Madinah Al-Munawwarah, Saudi Arabia
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16
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Effect of the Relative Positions of Di-Laterally Substituted Schiff Base Derivatives: Phase Transition and Computational Investigations. CRYSTALS 2021. [DOI: 10.3390/cryst11080870] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Two new laterally di-substituted derivatives namely, (E)-4-(((2-Chlorophenyl)imino)methyl)-3-methoxyphenyl 4-(alkoxy)benzoate, were designed and investigated for their mesomorphic properties. Elucidation of their molecular structures was carried out by elemental analyses, NMR and FT-IR, spectroscopy. Phase transitions were examined by differential scanning calorimetry (DSC) and polarized optical microscopy (POM). The optimized geometrical architectures of both compounds were deduced theoretically using GAUSSIAN 09 program. In order to establish the most probable conformation for each compound, four probable conformations were predicted for their positional isomers which vary according to the orientations of the two lateral groups. The results were used to correlate the experimental measurements with the predicted conformations. The study revealed that the investigated derivatives are non-mesomorphic and the orientations, as well as positions of the two-lateral groups, have a significant effect on the molecular packing of the molecules, their geometrical and thermal parameters.
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Synthesis, Optical Characterizations and Solar Energy Applications of New Schiff Base Materials. MATERIALS 2021; 14:ma14133718. [PMID: 34279287 PMCID: PMC8269905 DOI: 10.3390/ma14133718] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 06/27/2021] [Accepted: 06/29/2021] [Indexed: 02/02/2023]
Abstract
A new set of laterally OCH3-substituted photoactive liquid crystalline analogues, 4-hexyloxy phenyl- imino-4ʹ-(3-methoxyphenyl)-4ʹ’-alkoxybenzoates, were synthesized and investigated for their mesomorphic behavior. The prepared set constitutes five analogues that differ from each other by the terminally attached compact polar group. Characterization of the synthesized derivatives is conducted using differential scanning calorimetry (DSC), polarized optical microscopy (POM), and UV-spectroscopy. Molecular structures were elucidated by elemental analyses, FT-IR and NMR spectroscopy. DSC and POM investigations indicated that all the prepared derivatives are monomorphic possessing the nematic (N) phase, except for the unsubstituted derivative that is nonmesomorphic. On the other side, the photophysical study and the optical spectra measurements confirm the photoactivity of the present compounds under UV/visible irradiation. The measured optical spectra showed impressive enhancement in the optical absorption and reduction in the optical bandgap from 3.63 to 3.0 eV depending on the terminal group. From the study of the DC electric properties, the lowest resistance, 106.5 GΩ at scan rate 0.1 V/s, was observed for the I6d film with Cl terminal, which decreased to 49.5 GΩ by increasing the scan rate to 0.5 V/s. Moreover, the electrical conductance is decreased from 9.39 pS to 1.35 pS at scan rate 0.1 V/s by changing the terminal group from Cl to F. The enhanced optical absorption and the reduced energy gap make the optimized samples suitable material for solar energy applications.
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Altowyan AS, Ahmed HA, Gomha SM, Mostafa AM. Optical and Thermal Investigations of New Schiff Base/Ester Systems in Pure and Mixed States. Polymers (Basel) 2021; 13:1687. [PMID: 34067245 PMCID: PMC8196809 DOI: 10.3390/polym13111687] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 05/20/2021] [Accepted: 05/20/2021] [Indexed: 12/11/2022] Open
Abstract
New mesomorphic series, 4-hexadecyloxy phenyl-imino-4'-(3-methoxyphenyl)-4″-alkoxybenzoates (An), were prepared and investigated with different thermal and mesomorphic techniques. The synthesized homologous series constitutes four members that differ from each other in the terminal length of flexible chain (n) attached to phenyl ester moiety, which varies between n = 6, 8, 10, and 12 carbons. A lateral CH3O group is attached to the central benzene ring in the meta position with respect to the ester moiety. Molecular structures of all newly prepared homologues were elucidated via FT-IR, 1H and 13C NMR spectroscopy. Mesomorphic and thermal properties were examined by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and the mesophases identified by polarized optical microscopy (POM). DSC and POM examinations revealed that all members of the present series (An) exhibit a purely enantiotropic nematic (N) phase. Comparative evaluations and binary phase diagrams were established between the present homologues and their corresponding shorter one (Bn). The examination revealed that, the length of the flexible alkoxy chain incorporated into the phenylimino moiety is highly effective on the temperature range and stability of the mesophase observed. With respect to the binary mixtures An/Bn, the exhibited N phase showed to cover the whole composition range with eutectic behavior.
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Affiliation(s)
- Abeer S. Altowyan
- Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia;
| | - Hoda A. Ahmed
- Department of Chemistry, Faculty of Science, Cairo University, Cairo 12613, Egypt;
- Chemistry Department, College of Sciences, Yanbu, Taibah University, Yanbu 30799, Saudi Arabia
| | - Sobhi M. Gomha
- Department of Chemistry, Faculty of Science, Cairo University, Cairo 12613, Egypt;
- Chemistry Department, Faculty of Science, Islamic University in Almadinah Almonawara, Almadinah Almonawara 42351, Saudi Arabia
| | - Ayman M. Mostafa
- National Research Centre, Spectroscopy Department, Physics Division, El-Buhouth St., Dokki, Giza 12622, Egypt;
- Laser Technology Unit, Centre of Excellence for Advanced Sciences, National Research Centre, Dokki, Giza 12622, Egypt
- Center for Imaging and Microscopy (CIM), Zewail City of Science and Technology, October Gardens, 6th of October, Giza 12578, Egypt
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Synthesis, Thermal and Optical Characterizations of New Lateral Organic Systems. CRYSTALS 2021. [DOI: 10.3390/cryst11050551] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
New laterally OCH3-substituted optical organic Schiff base/ester series, namely 4-(4-(hexyloxyphenyl)iminomethyl)-3-methoxyphenyl 4-alkoxybenzoates, were prepared and characterized with different thermal, mesomorphic, and photoactive techniques. The prepared group constitutes five homologues that differ from each other in the number of carbons in the terminal alkoxy chain (n), which varies between n = 6, 8, 10, 12, and 16 carbons. The laterally protruded methoxy group is attached to the central benzene ring that makes an angle of 120° with the molecular long axis. Molecular structures of all newly prepared homologues were fully elucidated via FT-IR, 1H and 13C NMR spectroscopy. Mesomorphic transitions were determined via differential scanning calorimetry (DSC) and the phases identified by polarized optical microscopy (POM). Independent of the length of the terminal alkoxy chain attached to phenyl ester ring, only a monomorphic nematic (N) phase was observed for all the synthesized compounds. A comparative study was made between the present lateral methoxy-substituted homologues and their corresponding laterally-neat analogues. The results revealed that, depending on the length of the alkoxy chain and the presence or absence of the lateral methoxy group, different mesophases with different thermal stability and temperature ranges were observed. Finally, UV-vis spectra showed that the present nematogenic series possess photoactive properties that are of importance for many applications.
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Riyadh SM, Gomha SM. Two decades of the synthesis of mono- and bis-aminomercapto[1,2,4]triazoles. RSC Adv 2020; 10:24994-25012. [PMID: 35517465 PMCID: PMC9055246 DOI: 10.1039/d0ra04208k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 06/04/2020] [Indexed: 01/11/2023] Open
Abstract
4-Amino-5-mercapto[1,2,4]triazole and its 3-substituted derivatives have proven to be of biological interest and provide access to a new class of biologically active heterocyclic compounds for biomedical applications. This study will be helpful for scientific researchers interested in the chemistry of bifunctional versatile compounds as it provides a collection of all the methods for the preparation of 3-substituted-4-amino-5-mercapto[1,2,4]triazoles with aliphatic, aromatic, and heterocyclic moieties during the period from 2000 to mid-2020.
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Affiliation(s)
- Sayed M Riyadh
- Department of Chemistry, Faculty of Science, Taibah University Al-Madinah Al-Munawarah 30002 Saudi Arabia
- Department of Chemistry, Faculty of Science, Cairo University Giza 12613 Egypt
| | - Sobhi M Gomha
- Department of Chemistry, Faculty of Science, Cairo University Giza 12613 Egypt
- Department of Chemistry, Faculty of Science, Islamic University in Al-Madinah Al-Munawarah 42351 Saudi Arabia
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