Used as an intermediate in organic synthesis, particularly in pharmaceutical and agrochemical manufacturing. Its ester group and bromine functionality allow for further transformations, such as nucleophilic substitution or Grignard reactions. Commonly employed to introduce the butanoate chain with a protected alcohol (via the tert-butyl ester) in complex molecule assembly. Also utilized in the preparation of heterocyclic compounds and as a building block in the synthesis of bioactive molecules.