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Maračić S, Kraljević TG, Paljetak HČ, Perić M, Matijašić M, Verbanac D, Cetina M, Raić-Malić S. 1,2,3-Triazole pharmacophore-based benzofused nitrogen/sulfur heterocycles with potential anti-Moraxella catarrhalis activity. Bioorg Med Chem 2015; 23:7448-63. [PMID: 26578325 DOI: 10.1016/j.bmc.2015.10.042] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 10/28/2015] [Accepted: 10/29/2015] [Indexed: 02/08/2023]
Abstract
Versatile 1,2,3-triazole pharmacophore-based benzofused heterocycles containing halogen-substituted aromatic (9-17 and 25-28), 7-substituted coumarin (18-23 and 29-30) or penciclovir-like subunit (31a,b-38a) were designed and synthesized to evaluate their antibacterial activities against selected Gram-positive and Gram-negative bacteria. Hybridization approach using environmentally friendly Cu(I)-catalyzed click reaction under microwave irradiation was adopted in the synthesis of regioselective 1,4-disubstituted 1,2,3-triazole tethered heterocycles (9-23 and 25-30), while post-N-alkylation of NH-1,2,3-triazoles afforded both 2,4- (31a-38a) and 1,4-disubstituted (31b-33b, 35b-37b) 1,2,3-triazole regioisomers. The compounds 18-23 and 25-30 revealed fluorescence in the violet region of the visible spectrum with a strong influence of phenyl spacer in 25-30 on both wavelength and emission intensity. Fusion of selected subunits led to new hybrid architecture, benzothiazole-1,2,3-triazole-coumarin 29 that demonstrated extremely narrow spectrum activity towards fastidious Gram-negative bacteria Moraxella catarrhalis. Selected hybrid showed the potency against Moraxella catarrhalis (MIC⩽0.25μg/mL) comparable to that of reference antibiotic azithromycin, which suggested that further investigations are necessary to optimize this potential hit compound as a new anti-Moraxella catarrhalis agent.
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Affiliation(s)
- Silvija Maračić
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 20, HR-10000 Zagreb, Croatia
| | - Tatjana Gazivoda Kraljević
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 20, HR-10000 Zagreb, Croatia
| | - Hana Čipčić Paljetak
- Department for Intercellular Communication, Center for Translational and Clinical Research, School of Medicine, University of Zagreb, Šalata 2, HR-10000 Zagreb, Croatia
| | - Mihaela Perić
- Department for Intercellular Communication, Center for Translational and Clinical Research, School of Medicine, University of Zagreb, Šalata 2, HR-10000 Zagreb, Croatia
| | - Mario Matijašić
- Department for Intercellular Communication, Center for Translational and Clinical Research, School of Medicine, University of Zagreb, Šalata 2, HR-10000 Zagreb, Croatia
| | - Donatella Verbanac
- Department for Intercellular Communication, Center for Translational and Clinical Research, School of Medicine, University of Zagreb, Šalata 2, HR-10000 Zagreb, Croatia
| | - Mario Cetina
- Department of Applied Chemistry, Faculty of Textile Technology, University of Zagreb, Prilaz baruna Filipovića 28a, HR-10000 Zagreb, Croatia
| | - Silvana Raić-Malić
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 20, HR-10000 Zagreb, Croatia.
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