A series of new functionalized pyridinyl‐spirooxindoles have been synthesized through three‐component cyclization reactions. The selected compounds were screened for their in vitro antiproliferative activity against human lungcancercell line A549. Among the candidate structures, compound 1o demonstrated maximum inhibitory activity against A549cells with IC50 values of 28.38 μM. EdU (5‐Ethynyl‐2′‐