1,2-Oxazinane hydrochloride is primarily used in the field of organic synthesis as a versatile intermediate. It plays a crucial role in the development of various pharmaceuticals, particularly in the synthesis of compounds with potential therapeutic properties. This chemical is often employed in the preparation of heterocyclic compounds, which are essential in drug discovery and development. Additionally, it is utilized in research settings to study reaction mechanisms and to create novel chemical entities with specific biological activities. Its stability and reactivity make it a valuable tool in medicinal chemistry for designing and optimizing new drugs.