Pyrimidine-5-carbonitrile has a broad spectrum of biological activities such as antiviral, antioxidant, and anticancer activities. Among similar compounds, monastrol is the most prominent cell-permeant inhibitor of mitosis; therefore, we investigated the new Pyrimidine-5-carbonitrile as a cytotoxic agent for the p53 pathway. Objective: Several new benzyloxyphenyl pyrimidine-5-carbonitrile derivatives were designed, synthesized, and characterized, and their cytotoxicity was evaluated. The most active compounds were tested for their activity against p53 as a mechanistic target for antiproliferative action.