Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of nonsteroidal anti-inflammatory drugs (NSAIDs) and other bioactive molecules. Its structure allows for easy functionalization, making it valuable in medicinal chemistry for building heterocyclic compounds. It is also employed in the preparation of agrochemicals and dyes due to its reactive amino and ester groups. Commonly utilized in research laboratories for constructing thienopyridine and thienopyrimidine frameworks, which exhibit a range of biological activities including antimicrobial and antitumor properties.