Used primarily as an intermediate in the synthesis of pharmaceuticals and agrochemicals, this compound serves as a key building block for sulfonamide derivatives. Its reactive sulfonyl chloride group enables easy attachment to amines, facilitating the formation of sulfonamide bonds commonly found in bioactive molecules. It is particularly valuable in the development of herbicides and fungicides due to the enhanced stability and activity imparted by the benzoxazine core. Additionally, it has been employed in the preparation of dyes and fluorescent probes, where the heterocyclic structure contributes to favorable photophysical properties. Its utility in combinatorial chemistry and drug discovery makes it a versatile reagent in medicinal chemistry research.