A new series of N-substituted thiosemicarbazones (3a-u) bearing 2-naphthyl and dihydrobenzofuranyl scaffolds were synthesized in good to excellent yields (78-95%). The synthesized compounds were characterized by advanced spectroscopic techniques, such as FTIR, 1HNMR, 13CNMR and ESI-MS and evaluated as urease inhibitors. The structure of compound 3m was unambiguously confirmed by single crystal X-ray analysis. All compounds showed remarkable activities against urease enzyme with IC50 values in range of 1.4-36.1 µM. The majority of the synthesized compounds showed higher activity than the standard compound thiourea. Molecular docking was performed to study the mode of interaction of these compounds and their structure-activity relationship. These studies revealed that the compounds bind at the active site and interacts with the nickel atom present in the binding site. The molecular docking demonstrated excellent co-relations with the experimental findings.