Used as a protected form of 6-hydroxy-3,4-dihydro-2H-pyran in organic synthesis, particularly in the preparation of complex natural products and pharmaceuticals. The t-butyldimethylsiloxy (TBS) group acts as a robust protecting group for alcohols, offering stability under a variety of reaction conditions while being selectively removable with fluoride reagents. This compound is valuable in multi-step syntheses where chemoselectivity and functional group compatibility are critical, such as in the construction of polyketide-like structures or carbohydrate derivatives. Its cyclic enol ether structure also allows for controlled ring-opening or functionalization reactions, making it a versatile building block in synthetic routes.