Tributyl((methoxymethoxy)methyl)stannane is an organotin reagent employed in organic synthesis, particularly in palladium-catalyzed cross-coupling reactions like the Stille coupling, to transfer the (methoxymethoxy)methyl group to carbon centers. This group acts as a protected equivalent of the hydroxymethyl (-CH₂OH) functionality, facilitating the introduction of masked primary alcohol groups into complex molecules. It is especially useful in the total synthesis of natural products and pharmaceuticals, where precise control over functional group installation and subsequent deprotection under mild acidic conditions is required. Additionally, it finds applications in materials science for constructing specialized polymer architectures with latent hydroxyl sites.