Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors for cancer treatment. Its structure allows for selective modification, making it valuable in creating targeted therapies. Commonly employed in medicinal chemistry research to build complex heterocyclic systems found in bioactive molecules. Also utilized in the preparation of protease inhibitors and CNS-active agents due to its ability to cross biological membranes. Frequently appears in structure-activity relationship (SAR) studies to optimize drug potency and metabolic stability.