This compound, tert-butyldiphenyl(prop-2-yn-1-yloxy)silane, is the tert-butyldiphenylsilyl (TBDPS)-protected form of propargyl alcohol. It serves as a key building block in organic synthesis, allowing the terminal alkyne to undergo selective reactions (e.g., couplings, cycloadditions) without interference from the hydroxyl group. The bulky TBDPS protecting group provides excellent stability in basic, neutral, and mildly acidic conditions, and can be removed orthogonally using fluoride ions (e.g., TBAF) in the presence of other functional groups. This reagent is particularly valuable for constructing polyfunctional molecules, such as pharmaceuticals, natural products, and materials, where precise control over the propargyl functionality is essential. The steric bulk of TBDPS also minimizes side reactions during multi-step sequences.