Used in organic synthesis as a boronic ester coupling partner in Suzuki-Miyaura cross-coupling reactions to construct complex organic molecules, particularly in pharmaceutical and agrochemical research. The spirocyclic structure with a protected amine enhances stability and enables the development of novel bioactive compounds. The tert-butyl carbamate (Boc) group allows for selective deprotection, facilitating stepwise synthesis in drug discovery. Its methylene-linked boronate ester provides a handle for carbon-carbon bond formation, making it valuable in building molecular complexity.