Allylic and a-Allenic Alcohols

TMSCl is essential as a promoter in a low-valent vanadium-catalysed reductive cyclotrimerization of aliphatic aldehydes, producing 1,3-dioxolanes (equation 4). It is also an essential component in the zinc-induced intramolecular imine cross coupling of diarylidene sulphamides subsequent cleavage provides a route to unsymmetiical l,2-diaryl-l,2-diaminoethanes (equation 5). It acts as an activating agent in the samarium-promoted cyclopropanation of allylic and a-allenic alcohols. 

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