Used in pharmaceutical research as an intermediate for synthesizing biologically active compounds, particularly in the development of kinase inhibitors and anticancer agents. Its structure, featuring an iodine substituent at the 2-position and a methylthio group at the 4-position on the 7,8-dihydroquinazolin-5(6H)-one core, facilitates further functionalization, such as cross-coupling reactions, to target specific enzymes in cell signaling pathways. Also employed in the preparation of receptor modulators due to its affinity for certain protein binding sites. Commonly utilized in medicinal chemistry for lead optimization in drug discovery programs.