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 form stable heterocyclic structures that interact with biological targets. Commonly employed in research settings for designing drugs that modulate enzyme activity, especially in oncology and inflammatory diseases. Its chloro and methylthio functional groups allow for further chemical modifications, enabling the optimization of pharmacokinetic properties in drug candidates.