6-Fluoroquinazoline is primarily used as a key intermediate in the synthesis of pharmaceuticals, especially in the development of kinase inhibitors and anticancer agents. Its structure allows for selective modifications that enhance binding affinity to biological targets, making it valuable in drug discovery. It is commonly employed in the preparation of tyrosine kinase inhibitors, which are used in targeted cancer therapies. Additionally, it serves as a building block in the creation of agrochemicals and functional materials due to its stable aromatic framework and reactivity profile. Its fluorinated nature improves metabolic stability and membrane permeability in bioactive molecules, increasing its utility in medicinal chemistry.