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Rahim, Fazal; Ullah, Hayat; Taha, Muhammad; Hussain, Rafaqat; Sarfraz, Maliha; Iqbal, Rashid; Iqbal, Naveed; Khan, Shoaib; Ali Shah, Syed Adnan; Albalawi, Marzough Aziz; Abdelaziz, Mahmoud A; Alatawi, Fatema Suliman; Alasmari, Abdulrahman; Sakran, Mohamed I; Zidan, Nahla; Jafri, Ibrahim; Khan, Khalid Mohammed
Molecules (Basel, Switzerland), 12/2022, Letnik: 28, Številka: 1Journal Article
Triazole-based thiosemicarbazone derivatives ( ) were synthesized then characterized by spectroscopic techniques, such as 1HNMR and 13CNMR and HRMS (ESI). Newly synthesized derivatives were screened in vitro for inhibitory activity against acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE) enzymes. All derivatives (except and , which were found to be completely inactive) demonstrated moderate to good inhibitory effects ranging from 0.10 ± 0.050 to 12.20 ± 0.30 µM (for AChE) and 0.20 ± 0.10 to 14.10 ± 0.40 µM (for BuChE). The analogue (IC = 0.10 ± 0.050 for AChE and IC = 0.20 ± 0.050 µM for BuChE), which had di-substitutions (2-nitro, 3-hydroxy groups) at ring B and tri-substitutions (2-nitro, 4,5-dichloro groups) at ring C, and analogue (IC = 0.20 ± 0.10 µM for AChE and IC = 0.30 ± 0.10 µM for BuChE), which had di-Cl at 4,5, -NO groups at 2-position of phenyl ring B and hydroxy group at ortho-position of phenyl ring C, emerged as the most potent inhibitors of both targeted enzymes (AChE and BuChE) among the current series. A structure-activity relationship (SAR) was developed based on nature, position, number, electron donating/withdrawing effects of substitution/s on phenyl rings. Molecular docking studies were used to describe binding interactions of the most active inhibitors with active sites of AChE and BuChE.
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