Used as a key intermediate in organic synthesis, particularly in pharmaceutical and agrochemical manufacturing. Its bromine and ester functionalities allow for selective transformations—bromine serves as a handle for cross-coupling reactions (e.g., Suzuki or Negishi couplings), while the ester can be hydrolyzed to carboxylic acids or reduced to alcohols. Commonly employed in ring-expansion reactions and the construction of strained cyclobutane-containing molecules, which are increasingly important in drug design for conformational restriction. Also utilized in the synthesis of bioactive compounds where the cyclobutane motif enhances metabolic stability and target selectivity.