Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of boron-containing drugs that target proteasome inhibition, such as certain anticancer agents. Its reactive chlorocarbonyl and boronic acid groups allow for selective coupling reactions, making it valuable in medicinal chemistry for constructing complex molecules. Also employed in Suzuki-Miyaura cross-coupling reactions to form biaryl structures in drug discovery and in the preparation of covalent inhibitors due to the electrophilic nature of the acid chloride functionality.