Used as a key intermediate in the synthesis of fluorinated pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) where fluorine substitution enhances metabolic stability and bioavailability. The tert-butyl ester serves as a temporary protecting group for the carboxylic acid, which can be deprotected in later steps, while the aldehyde functionality allows for further derivatization, such as in Wittig reactions or reductive amination, enabling the construction of complex aromatic systems. Commonly employed in medicinal chemistry for the preparation of kinase inhibitors and other biologically active molecules. Also utilized in agrochemical research for designing novel compounds with improved environmental stability and target specificity.