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Hamad, Asad; Abbas Khan, Mohsin; Ahmad, Irshad; Imran, Aqeel; Khalil, Ruqaiya; Al-Adhami, Taha; Miraz Rahman, Khondaker; Quratulain; Zahra, Nudrat; Shafiq, Zahid
Bioorganic chemistry, December 2020, 2020-12-00, Letnik: 105Journal Article
Display omitted •A new series of Sulphamethazine and Sulphamethoxazole (3a-q) was synthesized.•Probed the compounds (3a-q) as urease Inhibitors.•SAR revealed that halogen and hydroxy group are critical for enzyme inhibition.•In silico molecular docking was carried out to study putative binding sites.•ADME studies were carried out to determine toxicity. In the current study, a novel series of Schiff base derivatives of (E)-4-(benzylideneamino)-N-(4,6-dimethylpyrimidin-2-yl)benzenesulfonamide (3a-3f) and (E)-4-(benzylideneamino)-N-(5-methylisoxazol-3-yl)benzenesulfonamide (3g-3q) were synthesize. The structures of synthetic compounds were elucidated by various spectroscopic techniques such as FTIR, NMR and spectrometric HRMS analysis. Synthetic derivatives were evaluated for their Jack Bean urease inhibitory activity using established in-vitro assay. It is worth mentioning here that most of our derivatives of both series displayed moderate to strong inhibitory activity, ranging between IC50 = 2.48 ± 0.78 µM and 35.63 ± 1.26 µM, as compared to standard thiourea (IC50 = 20.03 ± 2.03 µM). Further, structure activity relationship studies suggest that the presence of halogen at ortho and para positions on the aryl ring in (E)-4-(benzylideneamino)-N-(4,6-dimethylpyrimidin-2-yl)benzenesulfonamide derivatives and hydroxy and halogen in (E)-4-(benzylideneamino)-N-(5-methylisoxazol-3-yl)benzenesulfonamide derivatives increased the urease inhibitory activity. Furthermore, molecular docking studies were carried out in order to investigate the binding mode of this class of compounds to urease. In order to evaluate drug likeness of compounds ADME evaluation was done, and the synthesized compounds were found to be non-toxic and present passive gastrointestinal absorption. The data suggests the synthesized sulphamethazine and sulphamethoxazole derivatives can serve as a novel scaffold to inhibit urease.
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