6-(p-Toluenesulfonyl)-2-oxa-6-azaspiro[3.3]heptane is primarily used in organic synthesis as a versatile building block for constructing complex molecular structures. Its spirocyclic framework and functional groups make it valuable in the development of pharmaceuticals, particularly in the synthesis of biologically active compounds. It serves as a key intermediate in the preparation of heterocyclic compounds, which are often explored for their potential therapeutic properties. Additionally, it is utilized in the design of novel materials and catalysts, where its unique structure can impart specific reactivity or stability. Its tosyl group also facilitates further chemical modifications, making it a useful reagent in multi-step synthetic processes.