This compound, 2-(((tert-butyldimethylsilyl)oxy)methyl)prop-2-en-1-ol, is a protected diol derivative used as an intermediate in organic synthesis. It features a free allylic primary alcohol and a TBDMS-protected hydroxymethyl group at the 2-position of the propene backbone. The TBDMS protecting group shields one hydroxyl functionality, enabling selective reactions at the unprotected allylic alcohol during multi-step syntheses, such as in pharmaceutical production, natural product synthesis, and fine chemicals. Its stability under various conditions allows for complex manipulations without interference from the protected group. The TBDMS can be deprotected under mild acidic or fluoride conditions to reveal the original diol without affecting the rest of the molecule.