dramatically and led to low reaction yield. Owing to the synergistic effects of steric repulsion and electron-donation, the bulky 2-naphthyl substituted α-oxo-β, γ-unsaturated ketone 4m performed the reaction in low efficiency, providing 5m in 55% yield. Heteroaryl derived α-oxo-β, γ-unsaturated ketones underwent the reaction to furnish the corresponding products 5n and 5o in 56% and 63% yields, respectively. This result once again indicated that the electronic effects have obvious influence on the reactions.