The stereoselective allylation of chiral methyl ketones to give tertiaryhomoallylic ethers, which can easily be transformed into homoallylicalcohols, is described. Reaction of the enantiopure ketones 8a-d and the racemic ketones 26a-d with the norpseudoephedrine derivative 2 or ent-2 and allylsilane in the presence of a catalytic amount of trifluoromethanesulfonic acid, led to a series of homoallylic