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Hussein AHM, Khames AA, El-Adasy ABA, Atalla AA, Abdel-Rady M, Hassan MIA, Abou-Salim MA, Elshaier YAMM, Barakat A. Multifunctional Isosteric Pyridine Analogs-Based 2-Aminothiazole: Design, Synthesis, and Potential Phosphodiesterase-5 Inhibitory Activity. Molecules 2021; 26:902. [PMID: 33572094 PMCID: PMC7915674 DOI: 10.3390/molecules26040902] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Revised: 01/30/2021] [Accepted: 02/02/2021] [Indexed: 11/23/2022] Open
Abstract
The elaboration of new small molecules that target phosphodiesterase enzymes (PDEs), especially those of type 5 (PDE5), is an interesting and emerging topic nowadays. A new series of heterocycle-based aminothiazoles were designed and synthesized from the key intermediate, 3-oxo-N-(thiazol-2-yl)butanamide (a PDE5 inhibitor that retains its amidic function), as an essential pharmacophoric moiety. The PDE5 inhibitors prevent the degradation of cyclic guanosine monophosphate, thereby causing severe hypotension as a marked side effect. Hence, an in vivo testing of the target compounds was conducted to verify its relation with arterial blood pressure. Utilizing sildenafil as the reference drug, Compounds 5, 10a, and 11b achieved 100% inhibitions of PDE5 without significantly lowering the mean arterial blood pressures (115.95 ± 2.91, 110.3 ± 2.84, and 78.3 ± 2.57, respectively). The molecular docking study revealed that the tested compounds exhibited docking poses that were similar to that of sildenafil (exploiting the amide functionality that interacted with GLN:817:A). The molecular shape and electrostatic similarity revealed a comparable physically achievable electrostatic potential with the reference drug, sildenafil. Therefore, these concomitant results revealed that the tested compounds exerted sildenafil-like inhibitory effects (although without its known drawbacks) on blood circulation, thus suggesting that the tested compounds might represent a cornerstone of beneficial drug candidates for the safe treatment for erectile dysfunction.
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Affiliation(s)
| | - Ahmed A Khames
- Department of Chemistry, Faculty of Science, Al-Azhar University, Assiut 71524, Egypt
| | - Abu-Bakr A El-Adasy
- Department of Chemistry, Faculty of Science, Al-Azhar University, Assiut 71524, Egypt
| | - Ahmed A Atalla
- Department of Chemistry, Faculty of Science, Al-Azhar University, Assiut 71524, Egypt
| | - Mohamed Abdel-Rady
- Department of Chemistry, Faculty of Science, Assiut University, Assiut 71516, Egypt
| | - Mohamed I A Hassan
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Al-Azhar University, Assiut 71524, Egypt
| | - Mahrous A Abou-Salim
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Al-Azhar University, Assiut 71524, Egypt
| | - Yaseen A M M Elshaier
- Department of Organic and Medicinal Chemistry, Faculty of Pharmacy, University of Sadat City, Menoufiya 32958, Egypt
| | - Assem Barakat
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
- Department of Chemistry, Faculty of Science, Alexandria University, Alexandria 21321, Egypt
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Recent developments of 2-aminothiazoles in medicinal chemistry. Eur J Med Chem 2016; 109:89-98. [DOI: 10.1016/j.ejmech.2015.12.022] [Citation(s) in RCA: 126] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 12/10/2015] [Accepted: 12/12/2015] [Indexed: 02/06/2023]
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