Used as an intermediate in organic synthesis, particularly in the production of pharmaceuticals and agrochemicals. It serves as a building block for introducing bromo and ketone functional groups into more complex molecules. Commonly employed in the preparation of heterocyclic compounds and as a reagent in alkylation reactions. Also utilized in the synthesis of certain active pharmaceutical ingredients where a four-carbon chain with bromine and ketone functionality is required. Its reactivity makes it valuable in forming carbon-carbon bonds through nucleophilic substitution or condensation pathways.