Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors for cancer treatment. Its reactive acyl chloride group enables coupling with amines to form amide bonds, facilitating the construction of complex drug molecules. Commonly employed in medicinal chemistry for modifying bioactive structures to enhance solubility and binding affinity. Also utilized in the preparation of sulfonamide-based derivatives with potential antimicrobial and anti-inflammatory activities.