Copper-catalyzed aminobromination/elimination process: an efficient access to alpha,beta-unsaturated vicinal haloamino ketones and esters.

A novel copper-catalyzed aminobromination-elimination process has been developed, which provides an easy access to alpha,beta-unsaturated vicinal haloamindes derivatives from readily available alpha,beta-unsaturated ketones and esters in good to excellent yields. The isolated intermediate discloses that the current system proceeds through the aminobromination process.