Trimethylallylsilane reacts with monothioacetals in the presence of tin (IV) chloride, titaniumtetrachloride, or boron trifluoride–diethyl ether to give the homoallyl ethers and homoallyl sulphides.
Reaction of 2-methoxyethyl acetals with allylsilanes in the presence of titanium tetrachloride: regioselective carbon-oxygen bond cleavage of the unsymmetrical acetals