Used as a key intermediate in the synthesis of phosphodiesterase (PDE) inhibitors, particularly PDE5 inhibitors, which are important in the treatment of erectile dysfunction and pulmonary arterial hypertension. Its structure allows for selective modification to enhance binding affinity and pharmacokinetic properties in drug development. Also employed in the preparation of kinase inhibitors for potential anticancer therapies. Commonly utilized in medicinal chemistry research for scaffold optimization in heterocyclic compound design.