Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors and antiviral agents. Its halogenated structure allows for selective cross-coupling reactions, making it valuable in medicinal chemistry for building complex heterocyclic systems. Commonly employed in Suzuki and Buchwald–Hartwig reactions to introduce functionalized pyrazine rings into drug candidates. Also utilized in research settings for the design of novel bioactive molecules targeting oncology and infectious diseases.