Used as a reagent in organic synthesis, particularly in cross-coupling reactions to introduce the bicyclo[1.1.1]pentane (BCP) group into molecules. The BCP moiety is valued in medicinal chemistry as a bioisostere for phenyl or tert-butyl groups, improving pharmacokinetic properties such as metabolic stability and solubility. This potassium borate salt enables the formation of C–C bonds via transition metal-catalyzed reactions, allowing efficient incorporation of the BCP unit into drug candidates. Its application is especially prominent in the development of bioactive molecules and pharmaceuticals where structural rigidity and reduced lipophilicity are desired.