Treatment of olefins bearing a directinggroup with α,β-unsaturated carbonyl compounds, alkynes, or aldehydes in the presence of a catalytic amount of a rhenium complex, [ReBr(CO)3(thf)]2 gave γ,δ-unsaturated carbonyl compounds, dienes, and allylsilyl ethers, respectively. This reaction proceeds via C−H bond activation, insertion of unsaturated molecules into the formed rhenium−carbon bond, and then