Used as an intermediate in organic synthesis, particularly in pharmaceutical and agrochemical manufacturing. It serves as a protecting group reagent for carboxylic acids due to the stability of the tert-butyl ester, allowing selective reactions at other functional sites. The bromine atom enables further transformations such as nucleophilic substitution or coupling reactions, making it valuable in building complex molecules. Commonly employed in the synthesis of active pharmaceutical ingredients (APIs) where controlled reactivity and protection strategies are required.