Allyloxy-tert-butyldimethylsilane is the tert-butyldimethylsilyl (TBDMS) ether of allyl alcohol, serving as a protected form of allyl alcohol in organic synthesis. The TBDMS group provides steric protection to the hydroxyl functionality, offering stability under basic conditions, nucleophilic reagents, and various reaction environments, while being selectively deprotectable using fluoride ions or acidic conditions. The allyl moiety enables versatile functionalization, such as in allylation reactions or cross-coupling, making this compound valuable as a building block or intermediate in multi-step syntheses of complex natural products, pharmaceuticals, and polyfunctional molecules like carbohydrates and nucleosides.