Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors for cancer treatment. It serves as a building block in medicinal chemistry due to its ability to participate in substitution reactions, enabling the introduction of various functional groups at the 4-position. Its structure is valuable in designing compounds with enhanced binding affinity to specific enzyme targets. Also employed in research settings for the preparation of quinazoline-based derivatives with potential biological activity, including anti-inflammatory and antimicrobial properties.