Copper-Catalysed Regio- And Stereoselective Addition Of N-Heterocycles To Gem-Dihalo-Olefins: Synthesis Of Useful N-Vinyl Halides

A facile synthesis of N-vinyl halides via a Cu(I)-catalysed highly regio- and stereoselective addition of imidazoles or benzimidazoles to gem-dihalo-olefins was reported. The reaction proceeded smoothly in the presence of TBAB to afford the desired products in moderate to good yields. Application to the synthesis of aryl vinyl ethers derivatives is demonstrated.