The original work consists of three projects: 1. Synthesis and Biological Evaluation of Some Novel Thiadiazole-Benzofuran Hybrids as Potential Antitumor Agents 2. Efficient Synthesis of New Benzofuran-Based Thiazoles and Investigation of Their Cytotoxic Activity against Human Breast Carcinoma Cell Lines 3. Synthesis and Molecular docking of Some Novel Thiazoles and Thiadiazoles Incorporating Pyranochromene Moiety as Potent Anticancer Agents