Reaction of 2-methoxyethyl acetals with allylsilanes in the presence of titanium tetrachloride: regioselective carbon-oxygen bond cleavage of the unsymmetrical acetals
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.