5-oxa-8-azaspiro[3.5]nonane is primarily utilized in the field of organic synthesis as a versatile building block for the development of complex molecular structures. Its unique spirocyclic framework makes it valuable in the design and synthesis of pharmaceuticals, particularly in the creation of novel drug candidates with potential therapeutic applications. The compound is often employed in the construction of heterocyclic compounds, which are essential in medicinal chemistry for their biological activity. Additionally, it serves as a key intermediate in the synthesis of agrochemicals, contributing to the development of new pesticides and herbicides. Its structural features also make it a useful component in materials science, where it can be incorporated into polymers and other advanced materials to impart specific properties.