Used in the synthesis of Janus kinase (JAK) inhibitors, particularly in pharmaceutical development for treating inflammatory and autoimmune diseases such as rheumatoid arthritis and psoriasis. It serves as a key intermediate in constructing active pharmaceutical ingredients that modulate JAK-STAT signaling pathways. Its structure supports selective binding to kinase enzymes, enhancing drug efficacy and specificity. Commonly employed in research and development stages of oral small-molecule therapeutics.