Abstract
Background
To tackle the menace of multi-resistant bacteria which pose challenges to scientist, four benzotriazole derivatives and three benzimidazole derivatives were synthesized via two routes due to the importance of heterocyclic compound in medicinal chemistry. Two protein target DNA gyrase with PDB ID 2XCT and PDB ID 3ILW were docked with the synthesized compound and compared with the two standard drugs sparfloxacin and ciprofloxacin.
Results
For benzotriazole derivatives, the reaction in acetonitrile resulted in lower yields (18–25%) than with dimethylformamide/potassium hydroxide (DMF/KOH), which generated higher yields (68–92%) in shorter reaction time. Those of benzimidazole were comparable. The products were characterized by FTIR, 1H, and 13C NMR, while the association between atoms was shown in 2D NMR. The synthesized compounds were docked against two DNA gyrase with PDB ID 2XCT and PDB ID 3ILW. It was observed that 1-butyl-1H-benzotriazole (− 13.716) and 1-butyl-3-octyl-1H-benzotriazolium (− 12.324) were the most active against PDB ID 2XCT and PDB ID 3ILW, respectively. However, they were both less active than the standard drugs used. Using the agar diffusion technique, the synthesized compounds demonstrated broad-spectrum antibacterial activity against gram-positive and gram-negative pathogenic bacteria strains. Notably, all the compounds were of varying potency; with inhibition zones ranging from 24 to 30 mm and MIC ranging from 25 to 50 μg/mL.
Conclusions
The benzotriazole and benzimidazole derivatives were synthesized successfully. This research revealed that the synthesized compounds were active against organisms with activity, the docking results revealed that the synthesized compounds have relatively low binding energy when compared with the standard drug used as well as those reported earlier. Thus, it will give better interaction on the binding site of the protein. These synthesized compounds could be a source of new drugs that could be used to treat multi-resistance bacteria.
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Abbreviations
- DNA:
-
Deoxyribonucleic acid
- PDB ID:
-
Protein Data Bank Identity
- DMF:
-
Dimethylformamide
- KOH:
-
Potassium hydroxide
- FTIR:
-
Fourier transform infrared spectroscopy
- GCMS:
-
Gas chromatography-mass spectroscopy
- TLC:
-
Thin layer chromatography
- DMSO:
-
Dimethyl sulfoxide
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Acknowledgements
The authors are grateful to Mall. Abdullahi Mikaila of Nigeria Institute of Leather Technology (NILET) Zaria, Kaduna State, Nigeria for the antimicrobial activity studies and Mall. Jafar of Multi-User Laboratory, Ahmadu Bello University, Zaria Kduna State, Nigeria for the spectroscopic analysis. Finally, I will like to acknowledge Dr. Abdulfatai Usman, Mall. Abduljelil Ajala and Mall. Zakari Yau Ibrahim for their advice.
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TAJ. and Prof. AOO.: design the experiment and carry out the synthesis of the compounds. Dr. HI. and Dr. JDH.: write the manuscript and proofread the manuscript. Dr. DEA.: docked the synthesized compound against the target protein.
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Jimoh, T.A., Oyewale, A.O., Ibrahim, H. et al. Biological Evaluation and Docking Study of Synthesized Derivatives of Benzotriazole and Benzimidazole as Antibacterial Agents. Chemistry Africa 5, 509–523 (2022). https://doi.org/10.1007/s42250-022-00348-x
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DOI: https://doi.org/10.1007/s42250-022-00348-x