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Krajčovičová S, Jorda R, Vanda D, Soural M, Kryštof V. 1,4,6-Trisubstituted imidazo[4,5-c]pyridines as inhibitors of Bruton's tyrosine kinase. Eur J Med Chem 2020; 211:113094. [PMID: 33340912 DOI: 10.1016/j.ejmech.2020.113094] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 12/03/2020] [Accepted: 12/05/2020] [Indexed: 10/22/2022]
Abstract
Herein, we report an efficient synthetic approach towards trisubstituted imidazo [4,5-c]pyridines designed as inhibitors of Bruton's tyrosine kinase (BTK). Two alternative synthetic routes for the simple preparation of desired compounds with variable substitutions at the N1, C4, C6 positions were introduced with readily available building blocks. Further, the developed synthetic approach was feasible for isomeric compounds bearing imidazo [4,5-b]pyridine scaffolds. In contrast to expectations based on previous studies, the imidazo [4,5-c]pyridine inhibitor exhibited a significantly higher activity against BTK compared to its imidazo [4,5-b]pyridine isomer. An inherent SAR study in the series of imidazo [4,5-c]pyridine compounds revealed a remarkably high tolerance of C6 substitutions for both hydrophobic and hydrophilic substituents. Preliminary cellular experiments indicated selective BTK targeting in Burkitt lymphoma and mantle cell lymphoma cell lines. The inhibitors could thus serve as starting points for further development, eventually leading to BTK inhibitors that could be used after ibrutinib failure.
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Affiliation(s)
- Soňa Krajčovičová
- Department of Organic Chemistry, Faculty of Science, Palacký University, 17. Listopadu 12, 77146, Olomouc, Czech Republic
| | - Radek Jorda
- Laboratory of Growth Regulators, Palacký University & Institute of Experimental Botany, The Czech Academy of Sciences, Šlechtitelů 27, 78371, Olomouc, Czech Republic
| | - David Vanda
- Department of Organic Chemistry, Faculty of Science, Palacký University, 17. Listopadu 12, 77146, Olomouc, Czech Republic
| | - Miroslav Soural
- Department of Organic Chemistry, Faculty of Science, Palacký University, 17. Listopadu 12, 77146, Olomouc, Czech Republic; Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 5, 77900, Olomouc, Czech Republic.
| | - Vladimír Kryštof
- Laboratory of Growth Regulators, Palacký University & Institute of Experimental Botany, The Czech Academy of Sciences, Šlechtitelů 27, 78371, Olomouc, Czech Republic; Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 5, 77900, Olomouc, Czech Republic.
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Krause M, Foks H, Gobis K. Pharmacological Potential and Synthetic Approaches of Imidazo[4,5-b]pyridine and Imidazo[4,5-c]pyridine Derivatives. Molecules 2017; 22:molecules22030399. [PMID: 28273868 PMCID: PMC6155225 DOI: 10.3390/molecules22030399] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 03/02/2017] [Indexed: 12/23/2022] Open
Abstract
The structural resemblance between the fused imidazopyridine heterocyclic ring system and purines has prompted biological investigations to assess their potential therapeutic significance. They are known to play a crucial role in numerous disease conditions. The discovery of their first bioactivity as GABAA receptor positive allosteric modulators divulged their medicinal potential. Proton pump inhibitors, aromatase inhibitors, and NSAIDs were also found in this chemical group. Imidazopyridines have the ability to influence many cellular pathways necessary for the proper functioning of cancerous cells, pathogens, components of the immune system, enzymes involved in carbohydrate metabolism, etc. The collective results of biochemical and biophysical properties foregrounded their medicinal significance in central nervous system, digestive system, cancer, inflammation, etc. In recent years, new preparative methods for the synthesis of imidazopyridines using various catalysts have been described. The present manuscript to the best of our knowledge is the complete compilation on the synthesis and medicinal aspects of imidazo[4,5-b]pyridines and imidazo[4,5-c]pyridines reported from the year 2000 to date, including structure–activity relationships.
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Affiliation(s)
- Malwina Krause
- Department of Organic Chemistry, Medical University of Gdańsk, 107 Gen. Hallera Ave., 80-416 Gdańsk, Poland.
| | - Henryk Foks
- Department of Organic Chemistry, Medical University of Gdańsk, 107 Gen. Hallera Ave., 80-416 Gdańsk, Poland.
| | - Katarzyna Gobis
- Department of Organic Chemistry, Medical University of Gdańsk, 107 Gen. Hallera Ave., 80-416 Gdańsk, Poland.
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