Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the production of proton pump inhibitors (PPIs) like esomeprazole and omeprazole, which are widely prescribed for treating gastroesophageal reflux disease (GERD), peptic ulcers, and other acid-related disorders. Its functional groups enable selective chemical modifications, making it valuable in constructing complex heterocyclic drug molecules. Commonly employed in multi-step organic syntheses where controlled substitution and chiral center formation are required. Also utilized in research settings for developing new bioactive compounds with potential therapeutic applications.