Used as a key intermediate in organic synthesis, particularly in the preparation of pharmaceuticals and agrochemicals. Its iodine functionality allows for cross-coupling reactions, such as Suzuki or Heck reactions, enabling the formation of carbon-carbon bonds. The tetrahydropyran ring serves as a stable oxygen-containing heterocycle, often employed as a protecting group or structural mimic in drug design. It is also utilized in the synthesis of complex natural products where a six-membered oxygen heterocycle with a halogen handle is required for further functionalization.