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Iqbal H, Verma AK, Yadav P, Alam S, Shafiq M, Mishra D, Khan F, Hanif K, Negi AS, Chanda D. Antihypertensive Effect of a Novel Angiotensin II Receptor Blocker Fluorophenyl Benzimidazole: Contribution of cGMP, Voltage-dependent Calcium Channels, and BK Ca Channels to Vasorelaxant Mechanisms. Front Pharmacol 2021; 12:611109. [PMID: 33859561 PMCID: PMC8042648 DOI: 10.3389/fphar.2021.611109] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 02/09/2021] [Indexed: 12/03/2022] Open
Abstract
Background: The current study presents the novel angiotensin II receptor blocker fluorophenyl benzimidazole (FPD) as an antihypertensive agent in the SHR model of hypertension. We investigated the role of cGMP, voltage-dependent L-type calcium channels, and BKCa channels in the vasorelaxant mechanisms of FPD in the rat superior mesenteric artery. Methods: The antihypertensive effect of FPD was examined using an invasive technique measuring blood pressure in SHR animals. Using a myograph, tension measurement was completed in the superior mesenteric artery to elucidate the mechanisms of vasorelaxation involving AT1 receptors, the NO/cGMP pathway, L-type calcium channels, and BKCa channels. Ion flux (Ca2+, K+) studies were conducted in aortic smooth muscle cells. Putative targets proteins were determined by in silico docking studies. A safety evaluation of FPD was carried out using Swiss albino mice. Results: FPD significantly decreased blood pressure in SHR. It relaxed superior mesenteric arteries in a concentration-dependent manner and significantly inhibited angiotensin II-induced contraction. The relaxation response was also mediated by an increase in tissue cGMP levels, inhibition of L-type calcium channels, and the opening of BKCa channels. FPD further enhanced efflux of K+ and inhibited Bay K8644-stimulated Ca2+ influx in aortic smooth muscle cells and docked well in an in silico study with the targets. It was well tolerated in the toxicity study. Conclusion: The present study reports the antihypertensive activity of novel AT-1 receptor blocker FPD at 50 and 100 mg kg−1 with cGMP, L-type calcium channels, and BKCa channels as putative targets of vasorelaxation, and was found safe in oral toxicity.
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Affiliation(s)
- Hina Iqbal
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India
| | - Amit Kumar Verma
- Phytochemistry Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India
| | - Pankaj Yadav
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India
| | - Sarfaraz Alam
- Computational Biology Lab, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India
| | - Mohammad Shafiq
- Division of Pharmacology, CSIR-Central Drug Research Institute, Lucknow, India
| | - Divya Mishra
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India
| | - Feroz Khan
- Computational Biology Lab, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India
| | - Kashif Hanif
- Division of Pharmacology, CSIR-Central Drug Research Institute, Lucknow, India
| | - Arvind Singh Negi
- Phytochemistry Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India
| | - Debabrata Chanda
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India
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2
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Singu PS, Kanugala S, Dhawale SA, Kumar CG, Kumbhare RM. Synthesis and Pharmacological Evaluation of Some Amide Functionalized 1
H
‐Benzo[
d
]imidazole‐2‐thiol Derivatives as Antimicrobial Agents. ChemistrySelect 2020. [DOI: 10.1002/slct.201903380] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Padma S. Singu
- Department of Fluoro-AgrochemicalsCSIR-Indian Institute of Chemical Technology, Tarnaka Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad India
| | - Sirisha Kanugala
- Department of Organic Synthesis and Process ChemistryCSIR-Indian Institute of Chemical Technology, Tarnaka Hyderabad 500007, Telangana India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad India
| | - Sachin A. Dhawale
- Department of Pharmaceutical ChemistryY. B. Chavan College of PharmacyDr. Rafiq Zakaria Campus Aurangabad- 431001 India
| | - C. Ganesh Kumar
- Department of Organic Synthesis and Process ChemistryCSIR-Indian Institute of Chemical Technology, Tarnaka Hyderabad 500007, Telangana India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad India
| | - Ravindra M. Kumbhare
- Department of Fluoro-AgrochemicalsCSIR-Indian Institute of Chemical Technology, Tarnaka Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad India
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Shaikh IN, Hosamani KM, Kurjogi MM. Design, synthesis, and evaluation of new α-aminonitrile-based benzimidazole biomolecules as potent antimicrobial and antitubercular agents. Arch Pharm (Weinheim) 2018; 351. [PMID: 29356105 DOI: 10.1002/ardp.201700205] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 12/28/2017] [Accepted: 01/02/2018] [Indexed: 11/09/2022]
Abstract
The study explores the one-pot synthesis of novel α-aminonitriles by reacting 4-[(1H-benzimidazol-2-yl)methoxy]benzaldehyde, substituted anilines and sodium cyanide using a catalytic amount of copper dipyridine dichloride (CuPy2 Cl2 ) and employing the Strecker reaction under mild conditions. All the synthesized compounds were screened for antimicrobial and antitubercular activity. The promising lead compounds 4d and 4e were identified, with MIC values ranging between 3.9 and 7.8 µg/mL against different bacterial strains. Compounds 4c-e and 4g also showed good antifungal activities against the tested fungal strain. Among those tested, compound 4e exhibited excellent antitubercular activity (MIC 0.05 μg/mL) with a low level of cytotoxicity, suggesting that compound 4e is a promising lead for subsequent investigations in search for new antitubercular agents.
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Affiliation(s)
- Irfan N Shaikh
- Department of Chemistry, SECAB Institute of Engineering and Technology, Vijayapur, India.,P.G. Department of Studies in Chemistry, Karnatak University, Pavate Nagar, Dharwad, India
| | - Kallappa M Hosamani
- P.G. Department of Studies in Chemistry, Karnatak University, Pavate Nagar, Dharwad, India
| | - Mahantesh M Kurjogi
- Department of Biotechnology and Microbiology, Karnatak University, Pavate Nagar, Dharwad, India
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Marinescu M, Tudorache DG, Marton GI, Zalaru CM, Popa M, Chifiriuc MC, Stavarache CE, Constantinescu C. Density functional theory molecular modeling, chemical synthesis, and antimicrobial behaviour of selected benzimidazole derivatives. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.10.066] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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Pandey M, Muthu S, Nanje Gowda N. Quantum mechanical and spectroscopic (FT-IR, FT-Raman,1H,13C NMR, UV-Vis) studies, NBO, NLO, HOMO, LUMO and Fukui function analysis of 5-Methoxy-1H-benzo[d]imidazole-2(3H)-thione by DFT studies. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.10.064] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Datta A, Roy S, Mondal P, Guin PS. Spectroscopic, computational and electrochemical studies on 2-(4-nitrophenyl)-1H-benzo[d]imidazole and its interaction with cationic surfactant cetyltrimethylammonium bromide. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.04.049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Ajani OO, Aderohunmu DV, Ikpo CO, Adedapo AE, Olanrewaju IO. Functionalized Benzimidazole Scaffolds: Privileged Heterocycle for Drug Design in Therapeutic Medicine. Arch Pharm (Weinheim) 2016; 349:475-506. [PMID: 27213292 DOI: 10.1002/ardp.201500464] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 04/14/2016] [Accepted: 04/22/2016] [Indexed: 01/09/2023]
Abstract
Benzimidazole derivatives are crucial structural scaffolds found in diverse libraries of biologically active compounds which are therapeutically useful agents in drug discovery and medicinal research. They are structural isosteres of naturally occurring nucleotides, which allows them to interact with the biopolymers of living systems. Hence, there is a need to couple the latest information with the earlier documentations to understand the current status of the benzimidazole nucleus in medicinal chemistry research. This present work unveils the benzimidazole core as a multifunctional nucleus that serves as a resourceful tool of information for synthetic modifications of old existing candidates in order to tackle drug resistance bottlenecks in therapeutic medicine. This manuscript deals with the recent advances in the synthesis of benzimidazole derivatives, the widespread biological activities as well as pharmacokinetic reports. These present them as a toolbox for fighting infectious diseases and also make them excellent candidates for future drug design.
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Affiliation(s)
- Olayinka O Ajani
- Department of Chemistry, Covenant University, CST, Canaanland, Ota, Ogun State, Nigeria
| | - Damilola V Aderohunmu
- Department of Chemistry, Covenant University, CST, Canaanland, Ota, Ogun State, Nigeria
| | - Chinwe O Ikpo
- Department of Chemistry, University of the Western Cape, Bellville, Cape Town, South Africa
| | - Adebusayo E Adedapo
- Department of Chemistry, Covenant University, CST, Canaanland, Ota, Ogun State, Nigeria
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Synthesis of 6-chloro-2-Aryl-1H-imidazo[4,5-b]pyridine derivatives: Antidiabetic, antioxidant, β-glucuronidase inhibiton and their molecular docking studies. Bioorg Chem 2016; 65:48-56. [DOI: 10.1016/j.bioorg.2016.01.007] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 01/29/2016] [Accepted: 01/31/2016] [Indexed: 11/30/2022]
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9
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Kumar V, Khandare DG, Chatterjee A, Banerjee M. DBSA mediated chemoselective synthesis of 2-substituted benzimidazoles in aqueous media. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.07.147] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Nile SH, Kumar B, Park SW. In VitroEvaluation of Selected Benzimidazole Derivatives as an Antioxidant and Xanthine Oxidase Inhibitors. Chem Biol Drug Des 2013; 82:290-5. [DOI: 10.1111/cbdd.12141] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 02/12/2013] [Accepted: 03/29/2013] [Indexed: 12/31/2022]
Affiliation(s)
- Shivraj H. Nile
- Department of Molecular Biotechnology; College of Life and Environmental Sciences; Konkuk University; Seoul 143701 South Korea
| | - Brajesh Kumar
- Department of Chemistry; TATA College; Kolhan University; Chaibasa 833202 Jharkhand India
| | - Se W. Park
- Department of Molecular Biotechnology; College of Life and Environmental Sciences; Konkuk University; Seoul 143701 South Korea
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11
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Rational design, synthesis and QSAR study of vasorelaxant active 3-pyridinecarbonitriles incorporating 1H-benzimidazol-2-yl function. Eur J Med Chem 2013; 63:14-21. [DOI: 10.1016/j.ejmech.2013.01.042] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Revised: 01/20/2013] [Accepted: 01/24/2013] [Indexed: 11/23/2022]
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12
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Sharma A, Luxami V, Paul K. Synthesis, single crystal and antitumor activities of benzimidazole-quinazoline hybrids. Bioorg Med Chem Lett 2013; 23:3288-94. [PMID: 23611732 DOI: 10.1016/j.bmcl.2013.03.107] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2013] [Revised: 03/16/2013] [Accepted: 03/26/2013] [Indexed: 01/28/2023]
Abstract
A series of novel regioisomeric hybrids of quinazoline/benzimidazole viz. (3-allyl-2-methyl-3H-benzimidazol-5-yl)-(2-substituted-quinazolin-4-yl)-amine and (1-allyl-2-methyl-1H-benzimidazol-5-yl)-(2-substituted-quinazolin-4-yl)-amine of biological interest were synthesized. All the synthesized compounds were well characterized by (1)H and (13)C NMR as well as mass spectroscopy. The newly synthesized compounds were screened for in vitro antitumor activities against 60 tumor cell lines panel assay. A significant inhibition for cancer cells were observed with compound 9 and also more active against known drug 5-fluorouracil (5-FU) in some tumor cell lines. Compound 9 displayed appreciable anticancer activity against leukemia, colon, melanoma, renal and breast cancer cell lines.
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Affiliation(s)
- Alka Sharma
- School of Chemistry and Biochemistry, Thapar University, Patiala 147004, India
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13
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Benzimidazole derivatives: synthesis, leishmanicidal effectiveness, and molecular docking studies. Med Chem Res 2012. [DOI: 10.1007/s00044-012-0375-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Wu H, Yuan J, Bai Y, Wang H, Pan G, Kong J. A seven-coordinated manganese(II) complex with V-shaped ligand bis(N-benzylbenzimidazol-2-ylmethyl)benzylamine: Synthesis, structure, DNA-binding properties and antioxidant activities. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2012; 116:13-21. [DOI: 10.1016/j.jphotobiol.2012.07.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 06/30/2012] [Accepted: 07/16/2012] [Indexed: 10/28/2022]
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15
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Bansal Y, Silakari O. The therapeutic journey of benzimidazoles: a review. Bioorg Med Chem 2012; 20:6208-36. [PMID: 23031649 DOI: 10.1016/j.bmc.2012.09.013] [Citation(s) in RCA: 519] [Impact Index Per Article: 43.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 09/07/2012] [Accepted: 09/07/2012] [Indexed: 01/03/2023]
Abstract
Presence of benzimidazole nucleus in numerous categories of therapeutic agents such as antimicrobials, antivirals, antiparasites, anticancer, anti-inflammatory, antioxidants, proton pump inhibitors, antihypertensives, anticoagulants, immunomodulators, hormone modulators, CNS stimulants as well as depressants, lipid level modulators, antidiabetics, etc. has made it an indispensable anchor for development of new therapeutic agents. Varied substitutents around the benzimidazole nucleus have provided a wide spectrum of biological activities. Importance of this nucleus in some activities like, Angiotensin I (AT(1)) receptor antagonism and proton-pump inhibition is reviewed separately in literature. Even some very short reviews on biological importance of this nucleus are also known in literature. However, owing to fast development of new drugs possessing benzimidazole nucleus many research reports are generated in short span of time. So, there is a need to couple the latest information with the earlier information to understand the current status of benzimidazole nucleus in medicinal chemistry research. In the present review, various derivatives of benzimidazole with different pharmacological activities are described on the basis of substitution pattern around the nucleus with an aim to help medicinal chemists for developing an SAR on benzimidazole derived compounds for each activity. This discussion will further help in the development of novel benzimidazole compounds.
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Affiliation(s)
- Yogita Bansal
- Molecular Modelling Lab, Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab 147002, India
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16
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Al-Douh MH, Sahib HB, Osman H, Hamid SA, Salhimi SM. Anti-Proliferation Effects of Benzimidazole Derivatives on HCT-116 Colon Cancer and MCF-7 Breast Cancer Cell Lines. Asian Pac J Cancer Prev 2012; 13:4075-4079. [DOI: 10.7314/apjcp.2012.13.8.4075] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023] Open
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17
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Wu H, Yuan J, Bai Y, Pan G, Wang H, Shu X, Yu G. A V-shaped ligand bis(N-methylbenzimidazol-2-ylmethyl) benzylamine with its cobalt(II) complex: synthesis, crystal structure, DNA-binding properties, and antioxidant activity. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.658512] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Huilu Wu
- a School of Chemical and Biological Engineering, Lanzhou Jiaotong University , Lanzhou 730070 , P.R. China
| | - Jingkun Yuan
- a School of Chemical and Biological Engineering, Lanzhou Jiaotong University , Lanzhou 730070 , P.R. China
| | - Ying Bai
- a School of Chemical and Biological Engineering, Lanzhou Jiaotong University , Lanzhou 730070 , P.R. China
| | - Guolong Pan
- a School of Chemical and Biological Engineering, Lanzhou Jiaotong University , Lanzhou 730070 , P.R. China
| | - Hua Wang
- a School of Chemical and Biological Engineering, Lanzhou Jiaotong University , Lanzhou 730070 , P.R. China
| | - Xingbin Shu
- a School of Chemical and Biological Engineering, Lanzhou Jiaotong University , Lanzhou 730070 , P.R. China
| | - Gangqiang Yu
- a School of Chemical and Biological Engineering, Lanzhou Jiaotong University , Lanzhou 730070 , P.R. China
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Wu H, Yuan J, Bai Y, Pan G, Wang H, Shu X. Synthesis, structure, DNA-binding properties and antioxidant activity of a nickel(II) complex with bis(N-allylbenzimidazol-2-ylmethyl)benzylamine. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2012; 107:65-72. [DOI: 10.1016/j.jphotobiol.2011.11.010] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Revised: 11/23/2011] [Accepted: 11/30/2011] [Indexed: 11/26/2022]
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Kamal A, Reddy MK, Shaik TB, Rajender, Srikanth YVV, Reddy VS, Kumar GB, Kalivendi SV. Synthesis of terphenyl benzimidazoles as tubulin polymerization inhibitors. Eur J Med Chem 2012; 50:9-17. [PMID: 22361684 DOI: 10.1016/j.ejmech.2012.01.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Revised: 01/03/2012] [Accepted: 01/05/2012] [Indexed: 10/14/2022]
Abstract
A series of new terphenyl benzimidazoles (3a-z and 3aa-ad) were synthesized and evaluated for their anticancer activity. All the 30 compounds have shown moderate to good anticancer potency, however some of the compounds (3j, 3m-t and 3aa-ad) exhibited prominent anticancer potency with GI(50) values ranging from <0.1 to 9.72 μM. These compounds exhibit G2/M phase arrest and the analysis of tubulin by Western blot experiments in case of 3t and 3ad shows the disturbances that are caused in the ratio of soluble versus polymerized tubulin in cells. Compounds 3t and 3ad are the most promising candidates amongst the series and has the potential to be taken up for further detailed studies either alone or in combination with the existing therapies.
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Affiliation(s)
- Ahmed Kamal
- Division of Organic Chemistry, Indian Institute of Chemical Technology, Hyderabad 500607, India.
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Wu H, Yuan J, Bai Y, Pan G, Wang H, Kong J, Fan X, Liu H. Synthesis, structure, DNA-binding properties and antioxidant activity of silver(i) complexes containing V-shaped bis-benzimidazole ligands. Dalton Trans 2012; 41:8829-38. [DOI: 10.1039/c2dt30512g] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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New route for the synthesis of benzimidazoles by a one-pot multistep process with mono and bifunctional solid catalysts. Tetrahedron 2010. [DOI: 10.1016/j.tet.2009.11.048] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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23
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Al-Douh MH, Osman H, Hamid SA, Kia R, Fun HK. 2-[1-(2-Hydroxy-3-methoxybenzyl)-1H-benzimidazol-2-yl]-6-methoxyphenol monohydrate. Acta Crystallogr Sect E Struct Rep Online 2009; 65:o913-4. [PMID: 21582616 PMCID: PMC2968983 DOI: 10.1107/s1600536809010769] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2009] [Accepted: 03/24/2009] [Indexed: 11/17/2022]
Abstract
The asymmetric unit of the title compound, C(22)H(20)N(2)O(4)·H(2)O, comprises a substituted benzimidazole molecule and a water mol-ecule of crystallization. The dihedral angles between the benzimidazole ring system and the two outer benzene rings are 16.54 (4) and 86.13 (4)°. The dihedral angle between the two hydr-oxy-substituted benzene rings is 82.20 (5)°. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds, involving the hydr-oxy groups and water mol-ecules, form R(4) (4)(8) ring motifs, and link symmetry-related mol-ecules into extended chains along the c axis. The crystal structure is further stabilized by weak inter-molecular C-H⋯O hydrogen bonds, weak C-H⋯π and π-π stacking [centroid-centroid = 3.6495 (6)-3.7130 (6) Å] inter-actions. Intra-molecular O-H⋯O and O-H⋯N inter-actions are also present.
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Affiliation(s)
- Mohammed H. Al-Douh
- School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Hasnah Osman
- School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Shafida A. Hamid
- Kulliyyah of Science, International Islamic University Malaysia (IIUM), Jalan Istana, Bandar Indera Mahkota 25200 Kuantan, Pahang, Malaysia
| | - Reza Kia
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Hoong-Kun Fun
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
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Navarrete-Vázquez G, Moreno-Diaz H, Estrada-Soto S, Tlahuext H. 2-(2-Benzyl-oxyphen-yl)-1H-benzimid-azole. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o608. [PMID: 21201944 PMCID: PMC2960883 DOI: 10.1107/s1600536808004510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2008] [Accepted: 02/14/2008] [Indexed: 05/26/2023]
Abstract
The asymmetric unit of the title compound, C20H16N2O, contains two molecules. The dihedral angles between the benzimidazole ring systems and the attached benzene rings are 10.6 (5) and 13.7 (5)°. The conformers are linked by bifurcated three-centre hydrogen bonds, forming chains along the diagonal of the ab plane. The packing is further stabilized by π–π and C—H⋯π interactions.
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Geronikaki A, Druzhilovsky D, Zakharov A, Poroikov V. Computer-aided prediction for medicinal chemistry via the Internet. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2008; 19:27-38. [PMID: 18311632 DOI: 10.1080/10629360701843649] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Some computational tools for medicinal chemistry freely available on the Internet were compared to examine whether the results of prediction obtained with different methods coincided or not. It was shown that the correlation coefficients varied from 0.65 to 0.90 for log P (seven methods), from 0.01 to 0.73 for aqueous solubility (four methods), and from 0.19 to 0.73 for drug-likeness (three methods). While for log P estimates, reasonable average pairwise correlation was found, for aqueous solubility and drug-likeness it was rather poor. Therefore, using computational tools freely available via the Internet, medicinal chemists should evaluate their accuracy versus experimental data for particular series of compounds. In contrast to prediction of above mentioned properties, which can be done with several Internet tools, wide profiling of biological activity can be obtained only with PASS Inet (http://www.ibmc.msk.ru/PASS). PASS Inet was tested by a dozen medicinal chemists for compounds from different chemical series with various kinds of biological activity, and in the majority of cases the results of prediction coincided with the experiments. New anxiolytics, antiarrhythmics, antileishmanials, and other biologically active agents have been identified on this basis. The advantages and limitations of computer-aided predictions for medicinal chemistry via the Internet are discussed.
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Affiliation(s)
- A Geronikaki
- School of Pharmacy, Department of Pharmaceutical Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece.
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Navarrete‐Vázquez G, Moreno‐Diaz H, Estrada‐Soto S, Torres‐Piedra M, León‐Rivera I, Tlahuext H, Muñoz‐Muñiz O, Torres‐Gómez H. Microwave‐Assisted One‐Pot Synthesis of 2‐(Substituted phenyl)‐1H‐benzimidazole Derivatives. SYNTHETIC COMMUN 2007. [DOI: 10.1080/00397910701473325] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | | | - Samuel Estrada‐Soto
- a Faculty of Pharmacy , Autonomous University of Morelos State , Cuernavaca, México
| | | | - Ismael León‐Rivera
- b Chemical Research Center, Autonomous University of Morelos State , Cuernavaca, México
| | - Hugo Tlahuext
- b Chemical Research Center, Autonomous University of Morelos State , Cuernavaca, México
| | - Omar Muñoz‐Muñiz
- c Unit for Service and Support in Analytic Resolution , Veracruzana University , Xalapa, México
| | - Hector Torres‐Gómez
- d Faculty of Sciences , Autonomous University of Morelos State , Cuernavaca, México
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27
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Navarrete-Vázquez G, Moreno-Diaz H, Aguirre-Crespo F, León-Rivera I, Villalobos-Molina R, Muñoz-Muñiz O, Estrada-Soto S. Design, microwave-assisted synthesis, and spasmolytic activity of 2-(alkyloxyaryl)-1H-benzimidazole derivatives as constrained stilbene bioisosteres. Bioorg Med Chem Lett 2006; 16:4169-73. [PMID: 16784847 DOI: 10.1016/j.bmcl.2006.05.082] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2006] [Revised: 05/23/2006] [Accepted: 05/30/2006] [Indexed: 11/21/2022]
Abstract
A simple, fast, and efficient method for the preparation of several 2-(alkyloxyaryl)-1H-benzimidazole derivatives is reported. Compounds were synthesized through a rapid one-pot three component reaction via microwave irradiation, starting from commercially available aldehydes and o-phenylenediamine, in the presence of Na(2)S(2)O(5) and solvent-free conditions. The design of these compounds explore the hypothesis that the stilbene framework could be mimicked with an appropriate 2-(Alkyloxyphenyl)benzimidazole scaffold. This framework has a similar structural motif as the 6-phenylnaphthalene and behaves like stilbene bioisosteres. The spasmolytic activity of these compounds was recorded using isolated rat ileum test. Compound 12 was the most active of the series, showing an IC(50) of 1.19 microM.
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