Symmetrical Heterocyclic Cage Skeleton: Synthesis Urease Inhibition Activity Kinetic Mechanistic Insight and Molecular Docking Analyses

摘要

The present study focuses on the design and synthesis of a cage-like organic skeleton containing two triazole rings jointed via imine linkage. These molecules can act as urease inhibitors. The in-vitro urease inhibition screening results showed that the combination of the two triazole skeleton in the cage-like morphology exhibited comparable urease inhibition activity to that of the reference thiourea while the metallic complexation, especially with copper, nickel, and palladium, showed excellent activity results with IC50 values of 0.94 ± 0.13, 3.71 ± 0.61, and 7.64 ± 1.21 (>3a–>c), and 1.20 ± 0.52, 3.93 ± 0.45, and 12.87 ± 2.11 µM (>4a–>c). However, the rest of compounds among the targeted series exhibited a low to moderate enzyme inhibition potential. To better understand the compounds’ underlying mechanisms of the inhibitory effect (>3a and >4a) and their most active metal complexes (>3b and >4b), we performed an enzymatic kinetic analysis using the Lineweaver–Burk plot in the presence of different concentrations of inhibitors to represent the non-competitive inhibition nature of the compounds, >3a, >4a, and >4b, while mixed type inhibition was represented by the compound, >3b. Moreover, molecular docking confirmed the binding interactive behavior of >3a within the active site of the target protein.