N-Boc-1-oxa-8-azaspiro[4.5]decan-3-ol is a heterocyclic organic compound featuring a spirocyclic scaffold that combines a tetrahydrofuran ring and a piperidine ring, with the nitrogen atom protected by a tert-butoxycarbonyl (Boc) group and a hydroxyl group at the 3-position. This specific structural motif makes it a valuable and versatile building block in medicinal chemistry. Its primary application is as a key intermediate in the synthesis of pharmaceutical candidates, particularly those targeting the central nervous system (CNS). The spirocyclic structure is a privileged scaffold in drug discovery due to its three-dimensionality and potential to improve physicochemical properties and target binding. This compound has been utilized in research programs aimed at developing novel therapeutics, such as orexin receptor antagonists for the treatment of insomnia. As a functionalized spirocyclic amine, it serves as a sophisticated synthetic precursor. The Boc protecting group allows for selective deprotection and further functionalization of the nitrogen atom, while the hydroxyl group provides an additional handle for chemical modification, enabling the rapid construction of complex molecular libraries for biological screening.