The nucleophilic addition of alcohols, thiols, allylsilane, or triphen
ylphosphine on an allylic alcohol complexed to a chiral rhenium salt l
eads, in the presence of an acid, to the corresponding ethers, thioeth
ers, 1,5-diene, and phosphonium salt in high yields. The high regiosel
ectivity of these reactions is unambiguously established using a deute
rated ligand.