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Padilla-Martínez II, Cruz A, García-Báez EV, Rosales-Hernández MC, Mendieta Wejebe JE. N-substitution Reactions of 2-Aminobenzimidazoles to Access Pharmacophores. Curr Org Synth 2023; 20:177-219. [PMID: 35272598 DOI: 10.2174/1570179419666220310124223] [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: 09/29/2021] [Revised: 12/22/2021] [Accepted: 12/31/2021] [Indexed: 11/22/2022]
Abstract
Benzimidazole (BI) and its derivatives are interesting molecules in medicinal chemistry because several of these compounds have a diversity of biological activities and some of them are even used in clinical applications. In view of the importance of these compounds, synthetic chemists are still interested in finding new procedures for the synthesis of these classes of compounds. Astemizole (antihistaminic), Omeprazole (antiulcerative), and Rabendazole (fungicide) are important examples of compounds used in medicinal chemistry containing BI nuclei. It is interesting to observe that several of these compounds contain 2-aminobenzimidazole (2ABI) as the base nucleus. The structures of 2ABI derivatives are interesting because they have a planar delocalized structure with a cyclic guanidine group, which have three nitrogen atoms with free lone pairs and labile hydrogen atoms. The 10-π electron system of the aromatic BI ring conjugated with the nitrogen lone pair of the hexocyclic amino group, making these heterocycles to have an amphoteric character. Synthetic chemists have used 2ABI as a building block to produce BI derivatives as medicinally important molecules. In view of the importance of the BIs, and because no review was found in the literature about this topic, we reviewed and summarized the procedures related to the recent methodologies used in the N-substitution reactions of 2ABIs by using aliphatic and aromatic halogenides, dihalogenides, acid chlorides, alkylsulfonic chlorides, carboxylic acids, esters, ethyl chloroformates, anhydrides, SMe-isothioureas, alcohols, alkyl cyanates, thiocyanates, carbon disulfide and aldehydes or ketones to form Schiff bases. The use of diazotized 2ABI as intermediate to obtain 2-diazoBIs was included to produce Nsubstituted 2ABIs of pharmacological interest. Some commentaries about their biological activity were included.
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Affiliation(s)
- Itzia I Padilla-Martínez
- Laboratorio de Química Supramolecular y Nanociencias, Instituto Politécnico Nacional UPIBI, Av. Acueducto s/n, Barrio la Laguna Ticomán, Ciudad de México, 07340, Mexico
| | - Alejandro Cruz
- Laboratorio de Química Supramolecular y Nanociencias, Instituto Politécnico Nacional UPIBI, Av. Acueducto s/n, Barrio la Laguna Ticomán, Ciudad de México, 07340, Mexico
| | - Efrén V García-Báez
- Laboratorio de Química Supramolecular y Nanociencias, Instituto Politécnico Nacional UPIBI, Av. Acueducto s/n, Barrio la Laguna Ticomán, Ciudad de México, 07340, Mexico
| | - Martha C Rosales-Hernández
- Laboratorio de Biofísica y Biocatálisis, Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Salvador Díaz Mirón s/n, Casco de Santo Tomás, Distrito Federal 11340, México
| | - Jessica E Mendieta Wejebe
- Laboratorio de Biofísica y Biocatálisis, Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Salvador Díaz Mirón s/n, Casco de Santo Tomás, Distrito Federal 11340, México
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Pham EC, Le Thi TV, Ly Hong HH, Vo Thi BN, Vong LB, Vu TT, Vo DD, Tran Nguyen NV, Bao Le KN, Truong TN. N,2,6-Trisubstituted 1 H-benzimidazole derivatives as a new scaffold of antimicrobial and anticancer agents: design, synthesis, in vitro evaluation, and in silico studies. RSC Adv 2022; 13:399-420. [PMID: 36605630 PMCID: PMC9782508 DOI: 10.1039/d2ra06667j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 12/11/2022] [Indexed: 12/24/2022] Open
Abstract
Compounds containing benzimidazole moiety occupy privileged chemical space for discovering new bioactive substances. In continuation of our recent work, 69 benzimidazole derivatives were designed and synthesized with good to excellent yields of 46-99% using efficient synthesis protocol i.e. sodium metabisulfite catalyzed condensation of aromatic aldehydes with o-phenylenediamines to form 2-arylbenzimidazole derivatives followed by N-alkylation by conventional heating or microwave irradiation for diversification. Potent antibacterial compounds against MSSA and MRSA were discovered such as benzimidazole compounds 3k (2-(4-nitrophenyl), N-benzyl), 3l (2-(4-chlorophenyl), N-(4-chlorobenzyl)), 4c (2-(4-chlorophenyl), 6-methyl, N-benzyl), 4g (2-(4-nitrophenyl), 6-methyl, N-benzyl), and 4j (2-(4-nitrophenyl), 6-methyl, N-(4-chlorobenzyl)) with MIC of 4-16 μg mL-1. In addition, compound 4c showed good antimicrobial activities (MIC = 16 μg mL-1) against the bacteria strains Escherichia coli and Streptococcus faecalis. Moreover, compounds 3k, 3l, 4c, 4g, and 4j have been found to kill HepG2, MDA-MB-231, MCF7, RMS, and C26 cancer cells with low μM IC50 (2.39-10.95). These compounds showed comparable drug-like properties as ciprofloxacin, fluconazole, and paclitaxel in computational ADMET profiling. Finally, docking studies were used to assess potential protein targets responsible for their biological activities. Especially, we found that DHFR is a promising target both in silico and in vitro with compound 4c having IC50 of 2.35 μM.
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Affiliation(s)
- Em Canh Pham
- Department of Medicinal Chemistry, Faculty of Pharmacy, Hong Bang International University 700000 Ho Chi Minh City Vietnam
| | - Tuong Vi Le Thi
- Department of Pharmacology - Clinical Pharmacy, Faculty of Pharmacy, City Children's Hospital 700000 Ho Chi Minh City Vietnam
- Department of Organic Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City 700000 Ho Chi Minh City Vietnam
| | - Huong Ha Ly Hong
- Department of Pharmacognosy & Botany, Faculty of Pharmacy, Hong Bang International University 700000 Ho Chi Minh City Vietnam
| | - Bich Ngoc Vo Thi
- Department of Pharmacognosy & Botany, Faculty of Pharmacy, Hong Bang International University 700000 Ho Chi Minh City Vietnam
| | - Long B Vong
- School of Biomedical Engineering, International University 700000 Ho Chi Minh City Vietnam
- Vietnam National University Ho Chi Minh City (VNU-HCM) Ho Chi Minh 700000 Vietnam
| | - Thao Thanh Vu
- Department of Microbiology - Parasitology, Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City 700000 Ho Chi Minh City Vietnam
| | - Duy Duc Vo
- Uppsala University, Sweden, Tra Vinh University Vietnam
| | - Ngoc Vi Tran Nguyen
- Department of Organic Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City 700000 Ho Chi Minh City Vietnam
| | - Khanh Nguyen Bao Le
- Department of Organic Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City 700000 Ho Chi Minh City Vietnam
| | - Tuyen Ngoc Truong
- Department of Organic Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City 700000 Ho Chi Minh City Vietnam
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Burlov AS, Divaeva LN, Vlasenko VG, Koshchienko YV, Chaltsev BV, Mashchenko SA, Kiskin MA. SYNTHESIS AND CRYSTAL STRUCTURE OF THE COBALT(II) COMPLEX WITH 1-{1-[2-(o- TOLYLOXY)ETHYL]-1H-BENZIMIDAZOLE-2-YL}ETHAN-1-OL. J STRUCT CHEM+ 2022. [DOI: 10.1134/s0022476622080091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Pham EC, Thi Le TV, Truong TN. Design, synthesis, bio-evaluation, and in silico studies of some N-substituted 6-(chloro/nitro)-1 H-benzimidazole derivatives as antimicrobial and anticancer agents. RSC Adv 2022; 12:21621-21646. [PMID: 35975065 PMCID: PMC9347358 DOI: 10.1039/d2ra03491c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 07/20/2022] [Indexed: 01/13/2023] Open
Abstract
A new series of 6-substituted 1H-benzimidazole derivatives were synthesized by reacting various substituted aromatic aldehydes with 4-nitro-o-phenylenediamine and 4-chloro-o-phenylenediamine through condensation using sodium metabisulfite as the oxidative reagent. The N-substituted 6-(chloro/nitro)-1H-benzimidazole derivatives were prepared from the 6-substituted 1H-benzimidazole derivatives and substituted halides using potassium carbonate by conventional methods as well as by exposure to microwave irradiation. Seventy-six 1H-benzimidazole derivatives have been synthesized in moderate to excellent yields with the microwave-assisted method (40 to 99%). Compounds 1d, 2d, 3s, 4b, and 4k showed potent antibacterial activity against Escherichia coli, Streptococcus faecalis, MSSA (methicillin-susceptible strains of Staphylococcus aureus), and MRSA (methicillin-resistant strains of Staphylococcus aureus) with MIC (the minimum inhibitory concentration) ranging between 2 and 16 μg mL-1 as compared to ciprofloxacin (MIC = 8-16 μg mL-1), in particular compound 4k exhibits potent fungal activity against Candida albicans and Aspergillus niger with MIC ranging between 8 and 16 μg mL-1 compared with the standard drug fluconazole (MIC = 4-128 μg mL-1). In addition, compounds 1d, 2d, 3s, 4b, and 4k also showed the strongest anticancer activity among the synthesized compounds against five tested cell lines with IC50 (half-maximal inhibitory concentration) ranging between 1.84 and 10.28 μg mL-1, comparable to paclitaxel (IC50 = 1.38-6.13 μM). Furthermore, the five most active compounds showed a good ADMET (absorption, distribution, metabolism, excretion, and toxicity) profile in comparison to ciprofloxacin, fluconazole, and paclitaxel as reference drugs. Molecular docking predicted that dihydrofolate reductase protein from Staphylococcus aureus is the most suitable target for both antimicrobial and anticancer activities, and vascular endothelial growth factor receptor 2 and histone deacetylase 6 are the most suitable targets for anticancer activity of these potent compounds.
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Affiliation(s)
- Em Canh Pham
- Department of Medicinal Chemistry, Faculty of Pharmacy, Hong Bang International University 700000 Ho Chi Minh City Vietnam
| | - Tuong Vi Thi Le
- Department of Pharmacology - Clinical Pharmacy, Faculty of Pharmacy, City Children's Hospital 700000 Ho Chi Minh City Vietnam
| | - Tuyen Ngoc Truong
- Department of Organic Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City 700000 Ho Chi Minh City Vietnam
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Sherwani IAHA, Köse A, Güngör Ö, Kırpık H, Güngör SA, Köse M. Synthesis, characterization and investigation of photophysical and biological properties of Cu(II) and Zn(II) complexes of benzimidazole ligands. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6585] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | - Ayşegül Köse
- Department of Property Protection and Safety, Elbistan Vocational School Kahramanmaras Istiklal University Kahramanmaras Turkey
| | - Özge Güngör
- Chemistry Department Kahramanmaraş Sutcu Imam University Kahramanmaras Turkey
| | - Hilal Kırpık
- Chemistry Department Kahramanmaraş Sutcu Imam University Kahramanmaras Turkey
| | - Seyit Ali Güngör
- Chemistry Department Kahramanmaraş Sutcu Imam University Kahramanmaras Turkey
| | - Muhammet Köse
- Chemistry Department Kahramanmaraş Sutcu Imam University Kahramanmaras Turkey
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Ivanova AD, Kuz’menko TA, Smolentsev AI, Sheludyakova LA, Klyushova LS, Bogomyakov AS, Lavrov AN, Lavrenova LG. Complexes of Copper(II) Halides with 2-(3,5-Dimethylpyrazol-1-yl)benzimidazole: Synthesis and Magnetic and Cytotoxic Properties. RUSS J COORD CHEM+ 2021. [DOI: 10.1134/s1070328421110026] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Ivanova AD, Kuz’menko TA, Komarov VY, Glinskaya LA, Sheludyakova LA, Klyushova LS, Lavrenova LG. Synthesis and study of complexes of cobalt(II), nickel(II), and copper(II) halides with 2-(3,5-dimethylpyrazol-1-yl)benzimidazole. Russ Chem Bull 2021. [DOI: 10.1007/s11172-021-3251-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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8
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Yang W, Zhao Y, Zhou Z, Li L, Cui L, Luo H. Preparation of 1,2-substituted benzimidazoles via a copper-catalyzed three component coupling reaction. RSC Adv 2021; 11:8701-8707. [PMID: 35423384 PMCID: PMC8695204 DOI: 10.1039/d1ra00650a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 02/10/2021] [Indexed: 12/20/2022] Open
Abstract
1,2-Substituted benzimidazoles were prepared by simply stirring a mixture of copper catalysts, N-substituted o-phenylenediamines, sulfonyl azides and terminal alkynes. Particularly, the intermediate N-sulfonylketenimine occurred with two nucleophilic addition and the sulfonyl group was eliminated via cyclization. In a way, sulfonyl azides and copper catalysts activated the terminal alkynes to synthesize benzimidazoles.
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Affiliation(s)
- Weiguang Yang
- Guangdong Key Laboratory for Research and Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University Zhanjiang 524023 China
- The Marine Biomedical Research Institute of Guangdong Zhanjiang Zhanjiang Guangdong 524023 China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang) Zhanjiang Guangdong 524023 China
| | - Yu Zhao
- Guangdong Key Laboratory for Research and Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University Zhanjiang 524023 China
| | - Zitong Zhou
- Guangdong Key Laboratory for Research and Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University Zhanjiang 524023 China
| | - Li Li
- Guangdong Key Laboratory for Research and Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University Zhanjiang 524023 China
| | - Liao Cui
- Guangdong Key Laboratory for Research and Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University Zhanjiang 524023 China
| | - Hui Luo
- Guangdong Key Laboratory for Research and Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University Zhanjiang 524023 China
- The Marine Biomedical Research Institute of Guangdong Zhanjiang Zhanjiang Guangdong 524023 China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang) Zhanjiang Guangdong 524023 China
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Casarrubias-Tabarez B, Rivera-Fernández N, Rojas-Lemus M, López-Valdez N, Fortoul TI. Evaluation of the genotoxicity, cytotoxicity and antimalarial effect of sodium metavanadate po in a Plasmodium yoelii yoelii infected murine model. Toxicol Rep 2020; 7:1001-1007. [PMID: 32874923 PMCID: PMC7451625 DOI: 10.1016/j.toxrep.2020.08.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 06/18/2020] [Accepted: 08/05/2020] [Indexed: 01/13/2023] Open
Abstract
Oral administration of sodium metavanadate 10 mg/kg decreased parasitemia and increased survival in the Pyy mice model. Oral administration of 10 mg/kg of sodium metavanadate was neither genotoxic nor cytotoxic in the Pyy mice model. Sodium metavanadate is proposed as a potential antimalaric agent.
Malaria is a parasitic disease with the highest morbidity and mortality worldwide and antimalarial drug resistance has increased in last two decades. Chloroquine and artemisinin which were usedfor the treatment of malaria are also reported with resistances. Recently, some metallic compounds of ruthenium and iridium have been used as possible therapeutic agents against other parasites such as Leishmania and Trypanosoma cruzi. Organic and inorganic compounds of vanadium such as metavanadate, have been used lately because its therapeutic properties as antineoplastic and hypoglycemic agents. In this study we evaluated the genotoxicity and cytotoxicity of metavanadate per os and its working dose, as a previous step for the future use of metavanadate as anti-parasitic agent in a Plasmodium yoelii yoelii malarial lethal model. Our findings suggest that 10 mg/kg is a safe dose that decreases parasitemia and increases the survival of the Plasmodium yoelii yoelii infected mice with no evidence of genotoxicity, cytotoxicity with the dose selected.
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Affiliation(s)
- Brenda Casarrubias-Tabarez
- Department of Cellular and Tissular Biology, School of Medicine, UNAM, Mexico City, Mexico.,Posgrado en Ciencias Biologicas, UNAM, Mexico City, Mexico
| | - Norma Rivera-Fernández
- Department of Microbiology and Parasitology, School of Medicine, UNAM, Mexico City, Mexico
| | - Marcela Rojas-Lemus
- Department of Cellular and Tissular Biology, School of Medicine, UNAM, Mexico City, Mexico
| | - Nelly López-Valdez
- Department of Cellular and Tissular Biology, School of Medicine, UNAM, Mexico City, Mexico
| | - Teresa I Fortoul
- Department of Cellular and Tissular Biology, School of Medicine, UNAM, Mexico City, Mexico
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Bansal Y, Kaur M, Bansal G. Antimicrobial Potential of Benzimidazole Derived Molecules. Mini Rev Med Chem 2019; 19:624-646. [PMID: 29090668 DOI: 10.2174/1389557517666171101104024] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Revised: 03/12/2016] [Accepted: 09/15/2016] [Indexed: 01/07/2023]
Abstract
Structural resemblance of benzimidazole nucleus with purine nucleus in nucleotides makes benzimidazole derivatives attractive ligands to interact with biopolymers of a living system. The most prominent benzimidazole compound in nature is N-ribosyldimethylbenzimidazole, which serves as an axial ligand for cobalt in vitamin B12. This structural similarity prompted medicinal chemists across the globe to synthesize a variety of benzimidazole derivatives and to screen those for various biological activities, such as anticancer, hormone antagonist, antiviral, anti-HIV, anthelmintic, antiprotozoal, antimicrobial, antihypertensive, anti-inflammatory, analgesic, anxiolytic, antiallergic, coagulant, anticoagulant, antioxidant and antidiabetic activities. Hence, benzimidazole nucleus is considered as a privileged structure in drug discovery, and it is exploited by many research groups to develop numerous compounds that are purported to be antimicrobial. Despite a large volume of research in this area, no novel benzimidazole derived compound has emerged as clinically effective antimicrobial drug. In the present review, we have compiled various reports on benzimidazole derived antimicrobials, classified as monosubstituted, disubstituted, trisubstituted and tetrasubstituted benzimidazoles, bisbenzimidazoles, fused-benzimidazoles, and benzimidazole derivative-metal complexes. The purpose is to collate these research reports, and to generate a generalised outlay of benzimidazole derived molecules that can assist the medicinal chemists in selecting appropriate combination of substituents around the nucleus for designing potent antimicrobials.
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Affiliation(s)
- Yogita Bansal
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala - 147002, India
| | - Manjinder Kaur
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala - 147002, India
| | - Gulshan Bansal
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala - 147002, India
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Palladium(II) complexes of OS donor N-(di(butyl/phenyl)carbamothioyl)benzamide and their antiamoebic activity. Eur J Med Chem 2015; 98:54-60. [PMID: 26005916 DOI: 10.1016/j.ejmech.2015.05.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 05/03/2015] [Accepted: 05/04/2015] [Indexed: 11/21/2022]
Abstract
Two promising palladium(II) compounds of general formula, cis-[Pd(L-O,S)2] [where HL-O,S = N-(di(butyl/phenyl)carbamothioyl)benzamide] as metal based antiamoebic drug candidates, have been synthesized. Both complexes are characterized in the solid state by FT-IR spectroscopy, TGA and single crystal X-ray study, as well as in solution by other spectroscopic techniques such as (1)H and (13)C NMR, and UV-visible. All these studies confirm the coordination of ligands through oxygen and sulphur atoms upon thioenolization induced delocalization. Complexes adopt cis-configuration in the solid state. Both the complexes and their respective ligands were screened in vitro for antiamoebic activity against HM1:1MSS strain of Entamoeba histolytica by microdilution method and cell viability in response to drugs was checked by using MTT assay. The IC50 values in the range 0.30-0.80 μM for ligands as well as complexes compared to 1.40 for metronidazole along with their similar inhibitory effect on cell viability of HEK293 cells like metronidazole make them promising future antiamoebic drugs.
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Singla M, Ranjan R, Mahiya K, Mohapatra SC, Ahmad S. Nitric oxide inhibition, antioxidant, and antitumour activities of novel copper(ii) bis-benzimidazole diamide nanocoordination complexes. NEW J CHEM 2015. [DOI: 10.1039/c4nj02147a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Antitumor effect illustrated by changes in body weight. In control mice, body weight increased to 11.5 g but when treated withC3, body weight difference as compared to the control decreased by 4.7 g and decreased to 2.2 g and 0.6 g withC1andC2, respectively.
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Affiliation(s)
- Manisha Singla
- Department of Chemistry
- Keshav Mahavidhyalya
- University of Delhi
- New Delhi
- India
| | - Rajeev Ranjan
- Department of Zoology
- University of Delhi
- New Delhi
- India
| | - Kuldeep Mahiya
- Department of Chemistry
- Ch. Devi Lal University
- Sirsa
- India
| | - Subash C. Mohapatra
- Department of Chemistry
- Atma Ram Sanatan Dharma College
- University of Delhi
- New Delhi
- India
| | - Sharif Ahmad
- Department of Chemistry
- Jamia Millia Islamia
- New Delhi
- India
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Mixed ligand copper(II) complexes of 1,10-phenanthroline with tridentate phenolate/pyridyl/(benz)imidazolyl Schiff base ligands: Covalent vs non-covalent DNA binding, DNA cleavage and cytotoxicity. J Inorg Biochem 2014; 140:255-68. [DOI: 10.1016/j.jinorgbio.2014.07.016] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Revised: 07/19/2014] [Accepted: 07/22/2014] [Indexed: 11/24/2022]
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14
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Dutta PK, Panda S, Zade SS. Synthesis, characterization and coordination properties of 2-(2′-(methylseleno)phenyl)benzimidazole. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2013.11.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Juneja A, Macedo TS, Magalhaes Moreira DR, Pereira Soares MB, Lima Leite AC, Kelle de Andrade Lemoine Neves J, Alves Pereira VR, Avecilla F, Azam A. Synthesis of 4'-(2-ferrocenyl)-2,2':6'2''-terpyridine: characterization and antiprotozoal activity of Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) complexes. Eur J Med Chem 2014; 75:203-10. [PMID: 24534536 DOI: 10.1016/j.ejmech.2014.01.051] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 01/14/2014] [Accepted: 01/18/2014] [Indexed: 01/28/2023]
Abstract
A terpyridine ligand Fctpy was reacted with divalent metals (Cu, Co, Mn, Ni and Zn), yielding five complexes of general formula [Metal(Fctpy)2][PF6]2. The structure of Fctpy was determined by single crystal X-ray diffraction studies. The complexes characterized using various spectroscopic techniques suggested an octahedral geometry around the central metal ion. These complexes were screened for their antiamoebic, trypanocidal and antimalarial activities. It was found that, complexes 2 and 3 showed better IC50 values than metronidazole against HM1:IMSS strain of Entamoeba histolytica. A substantial parasitic inhibition was not observed for the trypanocidal activity. However, for the erythrocytic stage of W2 strain of Plasmodium falciparum, the complexes inhibited β-hematin formation. At the concentration of 10 μg/mL, these complexes did not display toxicity.
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Affiliation(s)
- Annu Juneja
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
| | - Tais Soares Macedo
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Rua Waldemar Falcão, 121, Candeal, 40296-710 Salvador, BA, Brazil
| | - Diogo Rodrigo Magalhaes Moreira
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Rua Waldemar Falcão, 121, Candeal, 40296-710 Salvador, BA, Brazil; Centro de Biotecnologia e Terapia Celular, Hospital São Rafael. Av. São Rafael, 2152, São Marcos, 41253-190 Salvador, BA, Brazil
| | - Milena Botelho Pereira Soares
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Rua Waldemar Falcão, 121, Candeal, 40296-710 Salvador, BA, Brazil; Centro de Biotecnologia e Terapia Celular, Hospital São Rafael. Av. São Rafael, 2152, São Marcos, 41253-190 Salvador, BA, Brazil
| | - Ana Cristina Lima Leite
- Department of Pharmaceutical Sciences, Centre for Health Sciences, Federal University of Pernambuco, 50740-520 Recife, PE, Brazil
| | | | - Valeria Rego Alves Pereira
- Departamento de Imunologia, Centro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz, 50670-420 Recife, PE, Brazil
| | - Fernando Avecilla
- Departamento de Química Fundamental, Universidade da Coruña, Campus da Zapateira s/n, 15071 A Coruña, Spain
| | - Amir Azam
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India.
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Pereira MB, Kopp CR, Fontana LA, de Oliveira GM, Back DF, Piquini PC, Villetti MA. Synthesis, X-ray structural features, DFT calculations and fluorescence studies of a new pyridoxal-benzimidazole ligand and its respective molybdenum complex. NEW J CHEM 2014. [DOI: 10.1039/c4nj00259h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Studies based on FPDFT helped us to elucidate the reaction mechanism involving the BIMIPY–H+ + (MoO2+2) species in the first complexation of molybdenum by a vitamin B6 constituent.
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Affiliation(s)
- Mateus Brum Pereira
- Departamento de Química
- Laboratório de Materiais Inorgânicos- LMI
- Universidade Federal de Santa Maria
- UFSM
- 97115-900 Santa Maria, Brazil
| | - Cristiéli R. Kopp
- Departamento de Química
- Laboratório de Materiais Inorgânicos- LMI
- Universidade Federal de Santa Maria
- UFSM
- 97115-900 Santa Maria, Brazil
| | - Liniquer A. Fontana
- Departamento de Química
- Laboratório de Materiais Inorgânicos- LMI
- Universidade Federal de Santa Maria
- UFSM
- 97115-900 Santa Maria, Brazil
| | - Gelson Manzoni de Oliveira
- Departamento de Química
- Laboratório de Materiais Inorgânicos- LMI
- Universidade Federal de Santa Maria
- UFSM
- 97115-900 Santa Maria, Brazil
| | - Davi Fernando Back
- Departamento de Química
- Laboratório de Materiais Inorgânicos- LMI
- Universidade Federal de Santa Maria
- UFSM
- 97115-900 Santa Maria, Brazil
| | - Paulo C. Piquini
- Departamento de Física
- Universidade Federal de Santa Maria
- UFSM
- 97105-900 Santa Maria, Brazil
| | - Marcos A. Villetti
- Laboratório de Espectroscopia e Polímeros
- Departamento de Física
- Universidade Federal de Santa Maria
- 97105-900 Santa Maria-RS, Brazil
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17
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Nevade SA, Lokapure SG, Kalyane NV. Synthesis and Pharmacological Evaluation of Some Novel 2-Mercapto Benzimidazole Derivatives. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2013. [DOI: 10.5012/jkcs.2013.57.6.755] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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18
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Debnath M, Dutta A, Biswas S, Das KK, Lee HM, Vícha J, Marek R, Marek J, Ali M. Catalytic oxidation of aromatic hydrocarbons by mono-oxido-alkoxidovanadium(V) complexes of ONNO donor ethylenediamine-bis(phenolate) ligands. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.07.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Chen F, Lei M, Hu L. Thiamine hydrochloride (VB1)-catalyzed one-pot synthesis of (E)-N-benzylidene-2-phenyl-1H-benzo[d]imidazo[1,2-a]imidazol-3-amine derivatives. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.02.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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20
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Adamovich SN, Mirskova AN, Mirskov RG, Lopyrev VA. Synthesis of Novel Benzimidazolium Salts of Biologically Active Chalcogenylacetic Acids. MENDELEEV COMMUNICATIONS 2012. [DOI: 10.1016/j.mencom.2012.11.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Maurya MR, Haldar C, Khan AA, Azam A, Salahuddin A, Kumar A, Costa Pessoa J. Synthesis, Characterization, Catalytic and Antiamoebic Activity of Vanadium Complexes of Binucleating Bis(dibasic tridentate ONS donor) Ligand Systems. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200012] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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23
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Potent inhibition of protein tyrosine phosphatases by copper complexes with multi-benzimidazole derivatives. Biometals 2011; 24:993-1004. [PMID: 21618062 DOI: 10.1007/s10534-011-9460-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2011] [Accepted: 04/20/2011] [Indexed: 10/18/2022]
Abstract
A series of copper complexes with multi-benzimidazole derivatives, including mono- and di-nuclear, were synthesized and characterized by Fourier transform IR spectroscopy, UV-Vis spectroscopy, elemental analysis, electrospray ionization mass spectrometry. The speciation of Cu/NTB in aqueous solution was investigated by potentiometric pH titrations. Their inhibitory effects against human protein tyrosine phosphatase 1B (PTP1B), T-cell protein tyrosine phosphatase (TCPTP), megakaryocyte protein tyrosine phosphatase 2 (PTP-MEG2), srchomology phosphatase 1 (SHP-1) and srchomology phosphatase 2 (SHP-2) were evaluated in vitro. The five copper complexes exhibit potent inhibition against PTP1B, TCPTP and PTP-MEG2 with almost same inhibitory effects with IC(50) at submicro molar level and about tenfold weaker inhibition versus SHP-1, but almost no inhibition against SHP-2. Kinetic analysis indicates that they are reversible competitive inhibitors of PTP1B. Fluorescence study on the interaction between PTP1B and complex 2 or 4 suggests that the complexes bind to PTP1B with the formation of a 1:1 complex. The binding constant are about 1.14 × 10(6) and 1.87 × 10(6) M(-1) at 310 K for 2 and 4, respectively.
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24
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Hranjec M, Starčević K, Pavelić SK, Lučin P, Pavelić K, Karminski Zamola G. Synthesis, spectroscopic characterization and antiproliferative evaluation in vitro of novel Schiff bases related to benzimidazoles. Eur J Med Chem 2011; 46:2274-9. [PMID: 21439689 DOI: 10.1016/j.ejmech.2011.03.008] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Revised: 03/01/2011] [Accepted: 03/01/2011] [Indexed: 12/01/2022]
Abstract
A series of novel benzimidazole substituted Schiff bases were synthesized by reaction of aromatic aldehydes with corresponding 2-aminobenzimidazoles. Their structure has been studied by 1H and 13C NMR, IR and UV/Vis spectroscopy. Majority of prepared Schiff bases were tested on their antiproliferative activity in vitro and exerted non-specific antiproliferative activity on the tested cell lines at the highest tested concentration. Compounds 18 and 19 exerted the strongest non-specific antiproliferative effect on all cell lines and a concentration-dependent effect on HeLa and MCF-7 cell lines at micromolar concentrations but simultaneously being highly cytotoxic on human fibroblasts as well.
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Affiliation(s)
- Marijana Hranjec
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 20, P.O. Box 177, HR-10000 Zagreb, Croatia.
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25
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El-Metwaly NM, Refat MS. Spectral, thermal, kinetic, molecular modeling and eukaryotic DNA degradation studies for a new series of albendazole (HABZ) complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 78:196-204. [PMID: 20934909 DOI: 10.1016/j.saa.2010.09.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2010] [Revised: 08/08/2010] [Accepted: 09/08/2010] [Indexed: 05/30/2023]
Abstract
This work represents the elaborated investigation for the ligational behavior of the albendazole ligand through its coordination with, Cu(II), Mn(II), Ni(II), Co(II) and Cr(III) ions. Elemental analysis, molar conductance, magnetic moment, spectral studies (IR, UV-Vis and ESR) and thermogravimetric analysis (TG and DTG) have been used to characterize the isolated complexes. A deliberate comparison for the IR spectra reveals that the ligand coordinated with all mentioned metal ions by the same manner as a neutral bidentate through carbonyl of ester moiety and NH groups. The proposed chelation form for such complexes is expected through out the preparation conditions in a relatively acidic medium. The powder XRD study reflects the amorphous nature for the investigated complexes except Mn(II). The conductivity measurements reflect the non-electrolytic feature for all complexes. In comparing with the constants for the magnetic measurements as well as the electronic spectral data, the octahedral structure was proposed strongly for Cr(III) and Ni(II), the tetrahedral for Co(II) and Mn(II) complexes but the square-pyramidal for the Cu(II) one. The thermogravimetric analysis confirms the presence or absence of water molecules by any type of attachments. Also, the kinetic parameters are estimated from DTG and TG curves. ESR spectrum data for Cu(II) solid complex confirms the square-pyramidal state is the most fitted one for the coordinated structure. The albendazole ligand and its complexes are biologically investigated against two bacteria as well as their effective effect on degradation of calf thymus DNA.
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26
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Yu X, Yang F, Ji D, Zhou J, Liu R, Li G, Li X, Chen J, Huang H, Yi P. Spectroscopic investigation of the interaction between diperoxovanadate complexes and benzimidazole-like ligands. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 77:816-820. [PMID: 20801712 DOI: 10.1016/j.saa.2010.08.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2010] [Revised: 07/16/2010] [Accepted: 08/03/2010] [Indexed: 05/29/2023]
Abstract
To understand the effects of benzimidazole substitution on reaction equilibrium, the interactions between a series of benzimidazole-like ligands and [OV(O₂)₂(D₂O)]⁻/[OV(O₂)₂(HOD)]⁻ in solution were explored by a combination of multinuclear ((1)H, (13)C, and (51)V) magnetic resonance and variable temperature NMR in 0.15 mol/L NaCl ionic medium for mimicking the physiological condition. Some direct NMR data are reported for the first time. These results show that the relative reactivity among the organic ligands is 2-methyl-1H-benzo[d]imidazole>(1H-benzo[d]imidazol-2-yl)methanol>1-(1H-benzo[d]imidazol-2-yl)ethanol>1H-benzo[d][1,2,3]triazole. Both the steric effect and the electron effect of the 2-position substituted groups in benzimidazole ring affect the reaction equilibrium. The competitive coordination results in the formation of a series of new six-coordinated peroxovanadate species [OV(O₂)₂L]⁻(L=benzimidazole-like ligands). Moreover, the results of density functional calculations provided a reasonable explanation on the relative reactivity of the benzimidazole-like ligands as well as the important role of solvation in these reactions.
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Affiliation(s)
- Xianyong Yu
- Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, Hunan Province College Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, PR China
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27
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Two 2D metal–organic frameworks based on 2,2′-bibenzimidazole ligand with (6,3) net topology. INORG CHEM COMMUN 2010. [DOI: 10.1016/j.inoche.2010.07.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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28
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Galal SA, Hegab KH, Hashem AM, Youssef NS. Synthesis and antitumor activity of novel benzimidazole-5-carboxylic acid derivatives and their transition metal complexes as topoisomerease II inhibitors. Eur J Med Chem 2010; 45:5685-91. [PMID: 20884089 DOI: 10.1016/j.ejmech.2010.09.023] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Revised: 09/03/2010] [Accepted: 09/08/2010] [Indexed: 02/06/2023]
Abstract
N-aminomethyl-1H-benzimidazole-5-carboxylic acid derivatives 2-5 and the ligand, 1-(5 (or 6-)-carboxy-1H-benzimidazol-2-ylmethyl)pyridinium chloride (6; H2L1) have been synthesized. New benzimidazole complexes 7-9 of the ligand 6; H2L1 with Cu2+, Co2 and Zn2+ were prepared. The growth-inhibitory against a panel of 21 human cancer cell lines of the synthesized compounds 1-9 was studied. Compounds 6-9 showed potent growth-inhibitory activity against the studied cell lines. The correlation coefficients according to COMPARE analysis of the National Cancer Institute screening protocol showed that the pattern of the growth-inhibitory effect of the compounds 6-9 was similar to that of etoposide and doxorubicin but different from that of SN-38 and cisplatin. The topoisomerase II inhibitory activity of the tested compounds 6-9 was studied. Compounds 6 and 8 inhibited topoisomerase II activity at 10 times lower concentration than etoposide in relaxation assay.
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Affiliation(s)
- Shadia A Galal
- Division of Pharmaceutical and Drug Industries, Department of Chemistry of Natural and Microbial Products, National Research Center, Cairo 12311, Egypt.
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29
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Maurya MR, Khan AA, Azam A, Ranjan S, Mondal N, Kumar A, Avecilla F, Pessoa JC. Vanadium complexes having [VIVO]2+ and [VVO2]+cores with binucleating dibasic tetradentate ligands: Synthesis, characterization, catalytic and antiamoebic activities. Dalton Trans 2010; 39:1345-60. [DOI: 10.1039/b915752b] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Cytotoxic activity, X-ray crystal structures and spectroscopic characterization of cobalt(II), copper(II) and zinc(II) coordination compounds with 2-substituted benzimidazoles. J Inorg Biochem 2009; 103:1204-13. [DOI: 10.1016/j.jinorgbio.2009.05.018] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2008] [Revised: 05/29/2009] [Accepted: 05/29/2009] [Indexed: 02/07/2023]
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31
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Singh S, Bharti N, Mohapatra PP. Chemistry and Biology of Synthetic and Naturally Occurring Antiamoebic Agents. Chem Rev 2009; 109:1900-47. [DOI: 10.1021/cr068217k] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Shailendra Singh
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, Florida 32610, and Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611
| | - Neelam Bharti
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, Florida 32610, and Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611
| | - Prabhu P. Mohapatra
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, Florida 32610, and Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611
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32
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Quezada-Buendía X, Esparza-Ruiz A, Peña-Hueso A, Barba-Behrens N, Contreras R, Flores-Parra A, Bernès S, Castillo-Blum SE. Synthesis and structural analyses of Co(III) coordination compounds of 2-(2′-pyridyl)benzimidazole and 2-(2-hydroxyphenyl)-1H-benzimidazole. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2008.01.048] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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33
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Poyraz M, Sari M, Demirci F, Kosar M, Demirayak S, Büyükgüngör O. Synthesis, crystal structure and biological activity of 1-(1H-benzoimidazol-2-yl)-ethanone thiosemicarbazone and its cobalt complex. Polyhedron 2008. [DOI: 10.1016/j.poly.2008.03.030] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Puratchikody A, Nagalakshmi G, Doble M. Experimental and QSAR Studies on Antimicrobial Activity of Benzimidazole Derivatives. Chem Pharm Bull (Tokyo) 2008; 56:273-81. [DOI: 10.1248/cpb.56.273] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | | | - Mukesh Doble
- Department of Biotechnology, Indian Institute of Technology Madras
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35
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El-Sherif AA, Jeragh BJA. Mixed ligand complexes of Cu(II)-2-(2-pyridyl)-benzimidazole and aliphatic or aromatic dicarboxylic acids: Synthesis, characterization and biological activity. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2007; 68:877-82. [PMID: 17320475 DOI: 10.1016/j.saa.2006.12.073] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2006] [Accepted: 12/10/2006] [Indexed: 05/14/2023]
Abstract
The synthesis and structural characterization of mixed ligand complexes derived from 2-(2-pyridyl)-benzimidazole (PBI) (1ry ligand) and aliphatic or aromatic dicarboxylic acids (2ry ligand) are reported. Cu(II) complexes were characterized on the bases of their elemental analyses, IR, ESR and thermal analyses. The elemental analysis indicated the formation of mixed ligand complexes in a mole ratio 1:1:1 (Cu:L(1):L(2)), L(1)=PBI and L(2)=oxalic acid, phthalic acid or malonic acid. IR spectra showed that PBI acts as a neutral bidentate coordinated to the Cu(II) via the pyridyl and imidazolyl nitrogen atoms. The dicarboxylic acids are bidentate with monodentate carboxylate groups. Thermal decomposition study of complexes was monitored by thermogravimetric (TG) and derivative thermogravimetric (DTG) analysis in N(2) atmosphere. The decomposition course and steps were analysed and the activation parameters of the nonisothermal decomposition were calculated from the TG curves and discussed. The isolated metal chelates were screened for their antimicrobial activities and the results are reported, discussed and compared with some known antibiotics.
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Affiliation(s)
- Ahmed A El-Sherif
- Department of Chemistry, Faculty of Science, Cairo University, Cairo, Egypt.
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36
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Maldonado-Rogado M, Viñuelas-Zahínos E, Luna-Giles F, Bernalte-García A. Nickel(II) and zinc(II) complexes with N-(5,6-dihydro-4H-1,3-thiazin-2-yl)-2-aminobenzimidazole (BzTz): Synthesis, spectral and structural characterization. Polyhedron 2007. [DOI: 10.1016/j.poly.2007.02.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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37
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Saczewski F, Dziemidowicz-Borys E, Bednarski PJ, Grünert R, Gdaniec M, Tabin P. Synthesis, crystal structure and biological activities of copper(II) complexes with chelating bidentate 2-substituted benzimidazole ligands. J Inorg Biochem 2006; 100:1389-98. [PMID: 16740312 DOI: 10.1016/j.jinorgbio.2006.04.002] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2005] [Revised: 04/04/2006] [Accepted: 04/05/2006] [Indexed: 11/16/2022]
Abstract
A series of Cu(II) coordination compounds with benzimidazole-derived bidentate chelating ligands have been prepared and characterized by X-ray crystallography. The 2-(4,5-dihydro-1H-imidazol-2-yl)-1H-benzimidazole CuCl2 complex 8 showed very potent superoxide dismutase (Cu,Zn-SOD) activity in vitro with IC50 of 0.09 microM, comparable to those described in the literature for best low molecular weight CuZnSOD mimics. Cytotoxicity studies with seven different human tumor cell lines in vitro showed that the most active 2-(4,5-dihydro-1H-imidazol-2-yl)-5-nitro-1H-benzimidazole CuCl2 complex 10 inhibited the growth of cancer cells with IC50 between 4.76 and 10.84 microM.
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Affiliation(s)
- Franciszek Saczewski
- Department of Chemical Technology of Drugs, Medical University of Gdańsk, 80-416 Gdańsk, Poland
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38
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Maurya MR, Kumar A, Abid M, Azam A. Dioxovanadium(V) and μ-oxo bis[oxovanadium(V)] complexes containing thiosemicarbazone based ONS donor set and their antiamoebic activity. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2006.02.032] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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39
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Maurya MR, Agarwal S, Abid M, Azam A, Bader C, Ebel M, Rehder D. Synthesis, characterisation, reactivity and in vitro antiamoebic activity of hydrazone based oxovanadium(iv), oxovanadium(v) and µ-bis(oxo)bis{oxovanadium(v)} complexes. Dalton Trans 2006:937-47. [PMID: 16462954 DOI: 10.1039/b512326g] [Citation(s) in RCA: 103] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Binuclear, mu-bis(oxo)bis{oxovanadium(V)} complexes [(VOL)2(mu-O)2](2 and 7)(where HL are the hydrazones Hacpy-nah I or Hacpy-fah II; acpy = 2-acetylpyridine, nah = nicotinic acid hydrazide and fah = 2-furoic acid hydrazide) were prepared by the reaction of [VO(acac)2] and the ligands in methanol followed by aerial oxidation. The paramagnetic intermediate complexes [VO(acac)(acpy-nah)](1) and [VO(acac)(acpy-fah)](6) have also been isolated. Treatment of [VO(acac)(acpy-nah)] and [VO(acac)(acpy-fah)] with aqueous H2O2 yields the oxoperoxovanadium(V) complexes [VO(O2)(acpy-nah)](3) and [VO(O2)(acpy-fah)](8). In the presence of catechol (H2cat) or benzohydroxamic acid (H2bha), 1 and 6 give the mixed chelate complexes [VO(cat)L](HL =I: 4, HL =II: 9) or [VO(bha)L](HL =I: 5, HL =II: 10). Complexes 4, 5, 9 and 10 slowly convert to the corresponding oxo-mu-oxo species 2 and 7 in DMF solution. Ascorbic acid enhances this conversion under aerobic conditions, possibly through reduction of these complexes with concomitant removal of coordinated catecholate or benzohydroxamate. Acidification of 7 with HCl dissolved in methanol afforded a hydroxo(oxo) complex. The crystal and molecular structure of 2.1.5H2O has been determined, and the structure of 7 re-determined, by single crystal X-ray diffraction. Both of these binuclear complexes contain the uncommon asymmetrical {VO(mu-O)}2 diamond core. The in vitro tests of the antiamoebic activity of ligands I and II and their binuclear complexes 2 and 7 against the protozoan parasite Entamoeba histolytica show that the ligands have no amoebicidal activity while their vanadium complexes 2 and 7 display more effective amoebicidal activity than the most commonly used drug metronidazole (IC50 values are 1.68 and 0.45 microM, respectively vs 1.81 microM for metronidazole). Complexes 2 and 7 catalyse the oxidation of styrene and ethyl benzene effectively. Oxidation of styrene, using H2O2 as an oxidant, gives styrene epoxide, 2-phenylacetaldehyde, benzaldehyde, benzoic acid and 1-phenyl-ethane-1,2-diol, while ethyl benzene yields benzyl alcohol, benzaldehyde and 1-phenyl-ethane-1,2-diol.
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Affiliation(s)
- Mannar R Maurya
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247 667, India.
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40
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Ghosh T, Roy A, Bhattacharya S, Banerjee S. A family of mixed-ligand oxovanadium(V) complexes incorporating tridentate ONO donor hydrazone ligands derived from acetylhydrazide and 2-hydroxybenzaldehyde/2-hydroxyacetophenone. TRANSIT METAL CHEM 2005. [DOI: 10.1007/s11243-005-0727-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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41
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Maurya M, Khurana S, Shailendra, Azam A, Zhang W, Rehder D. Synthesis, Characterisation and Antiamoebic Studies of Dioxovanadium(V) Complexes Containing ONS Donor Ligands Derived from S-Benzyldithiocarbazate. Eur J Inorg Chem 2003. [DOI: 10.1002/ejic.200200642] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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