The reaction of aliphatic acyclic α, α′-dibromoketones with primary amines gave rise to α- iminoketones and α-diimines. Both reaction products could be selectively obtained under appropriate reaction conditions. Sterically hindered α, α-dibromoketones did not react with primary amines, although, under forcing conditions the Favorskii rearrangement could be induced. In aqueous methanol, α, α′-dibromoketones reacted with primary amines to ...