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Guseinov FI, Kobrakov KI, Ugrak BI, Atioğlu Z, Akkurt M, Bhattarai A. Crystal structure and Hirshfeld surface analysis of 2,2,2-tri-fluoro-1-(7-methyl-imidazo[1,2- a]pyridin-3-yl)ethan-1-one. Acta Crystallogr E Crystallogr Commun 2022; 78:12-17. [PMID: 35079415 PMCID: PMC8739203 DOI: 10.1107/s2056989021012676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 11/29/2021] [Indexed: 11/30/2022]
Abstract
The bicyclic imidazo[1,2-a]pyridine core in the mol-ecule of the title compound, C10H7F3N2O, is planar within 0.004 (1) Å. In the crystal, the mol-ecules are linked by pairs of C-H⋯N and C-H⋯O hydrogen bonds, forming strips. These strips are connected by the F⋯F contacts into layers, which are further joined by π-π stacking inter-actions. The Hirshfeld surface analysis and fingerprint plots reveal that mol-ecular packing is governed by F⋯H/H⋯F (31.6%), H⋯H (16.8%), C⋯H/H⋯C (13.8%) and O⋯H/H⋯O (8.5%) contacts.
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Affiliation(s)
- Firudin I. Guseinov
- Kosygin State University of Russia, 117997 Moscow, Russian Federation
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation
| | | | - Bogdan I. Ugrak
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation
| | - Zeliha Atioğlu
- Department of Aircraft Electrics and Electronics, School of Applied Sciences, Cappadocia University, Mustafapaşa, 50420 Ürgüp, Nevşehir, Turkey
| | - Mehmet Akkurt
- Department of Physics, Faculty of Sciences, Erciyes University, 38039 Kayseri, Turkey
| | - Ajaya Bhattarai
- Department of Chemistry, M.M.A.M.C (Tribhuvan University) Biratnagar, Nepal
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Khamees HA, Chaluvaiah K, El-khatatneh NA, Swamynayaka A, Chong KH, Dasappa JP, Madegowda M. Crystal structure, DFT calculation, Hirshfeld surface analysis and energy framework study of 6-bromo-2-(4-bromo-phen-yl)imidazo[1,2- a]pyridine. Acta Crystallogr E Crystallogr Commun 2019; 75:1620-1626. [PMID: 31709079 PMCID: PMC6829731 DOI: 10.1107/s2056989019013410] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 09/30/2019] [Indexed: 11/13/2022]
Abstract
The title imidazo[1,2-a] pyridine derivative, C13H8Br2N2, was synthesized via a single-step reaction method. The title mol-ecule is planar, showing a dihedral angle of 0.62 (17)° between the phenyl and the imidazo[1,2-a] pyridine rings. An intra-molecular C-H⋯N hydrogen bond with an S(5) ring motif is present. In the crystal, a short H⋯H contact links adjacent mol-ecules into inversion-related dimers. The dimers are linked in turn by weak C-H⋯π and slipped π-π stacking inter-actions, forming layers parallel to (110). The layers are connected into a three-dimensional network by short Br⋯H contacts. Two-dimensional fingerprint plots and three-dimensional Hirshfeld surface analysis of the inter-molecular contacts reveal that the most important contributions for the crystal packing are from H⋯Br/Br⋯H (26.1%), H⋯H (21.7%), H⋯C/C⋯H (21.3%) and C⋯C (6.5%) inter-actions. Energy framework calculations suggest that the contacts formed between mol-ecules are largely dispersive in nature. Analysis of HOMO-LUMO energies from a DFT calculation reveals the pure π character of the aromatic rings with the highest electron density on the phenyl ring, and σ character of the electron density on the Br atoms. The HOMO-LUMO gap was found to be 4.343 eV.
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Affiliation(s)
- Hussien Ahmed Khamees
- Department of Studies in Physics, Manasagangotri, University of Mysore, Mysuru 570 006, Karnataka, India
| | - Kumara Chaluvaiah
- Department of Chemistry, Mangalore University, Mangalagangothri, Mangaluru 574 199, Karnataka, India
| | - Nasseem Ahmed El-khatatneh
- Department of Studies in Physics, Manasagangotri, University of Mysore, Mysuru 570 006, Karnataka, India
| | - Ananda Swamynayaka
- Department of Studies in Physics, Manasagangotri, University of Mysore, Mysuru 570 006, Karnataka, India
| | - Kwong Huey Chong
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia 43400, UPM Serdang, Selangor Darul Ehsan, Malaysia
| | - Jagadeesh Prasad Dasappa
- Department of Chemistry, Mangalore University, Mangalagangothri, Mangaluru 574 199, Karnataka, India
| | - Mahendra Madegowda
- Department of Studies in Physics, Manasagangotri, University of Mysore, Mysuru 570 006, Karnataka, India
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Kwong HC, Chidan Kumar CS, Mah SH, Mah YL, Chia TS, Quah CK, Lim GK, Chandraju S. Crystal Correlation Of Heterocyclic Imidazo[1,2-a]pyridine Analogues and Their Anticholinesterase Potential Evaluation. Sci Rep 2019; 9:926. [PMID: 30700752 PMCID: PMC6354011 DOI: 10.1038/s41598-018-37486-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 12/05/2018] [Indexed: 12/20/2022] Open
Abstract
Imidazo[1,2-a]pyridine-based compounds are clinically important to the treatments of heart and circulatory failures, while many are under development for pharmaceutical uses. In this study, a series of imidazo[1,2-a]pyridine-based derivatives 2(a-o) were synthesized by reacting a-haloketones with 2-aminopyridines in a basic media at ambient temperature. Single crystal X-ray diffraction studies suggest that with low degree-of-freedom, the introduction of bulky adamantyl or electron-rich biphenyl moiety into the imidazopyridine derivatives will not affect its structural occupancy. Imidazo[1,2-a]pyridine-based derivatives with biphenyl side chain are potential AChE inhibitors. Compound 2h which bears a biphenyl side chain and methyl substituent at the position R4 of the imidazo[1,2-a]pyridine ring showed the strongest AChE inhibition with an IC50 value of 79 µM. However, imidazo[1,2-a]pyridine derivatives with phenyl side chain exhibit better BChE inhibition effect among the series. Compound 2j with 3,4-dichlorophenyl side chain and unsubstituted imidazo[1,2-a]pyridine ring appears to be the strongest BChE inhibitor with an IC50 value of 65 µM and good selectivity. The inhibitory effects of active compounds were further confirmed by computational molecular docking studies. The results unveiled that peripheral anionic sites of AChE and acyl pocket of BChE were the predominated binding sites for the subjected inhibitors.
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Affiliation(s)
- Huey Chong Kwong
- School of Chemical Sciences, Universiti Sains Malaysia, Penang, 11800 USM, Malaysia.
| | - C S Chidan Kumar
- Department of Engineering Chemistry, Vidya Vikas Institute of Engineering & Technology, Visvesvaraya Technological University, Alanahalli, Mysuru, 570028, Karnataka, India
| | - Siau Hui Mah
- School of Biosciences, Taylor's University, Lakeside Campus, 47500, Subang Jaya, Selangor, Malaysia
| | - Yew Leng Mah
- Hospital Pulau Pinang, Jalan Residensi, 10990 George Town, Pulau Pinang, Malaysia
| | - Tze Shyang Chia
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, Penang, 11800 USM, Malaysia
| | - Ching Kheng Quah
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, Penang, 11800 USM, Malaysia.
| | - Gin Keat Lim
- School of Chemical Sciences, Universiti Sains Malaysia, Penang, 11800 USM, Malaysia
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