Abstract The bromination of 2-benzoylpyrrole with copper (II) bromide in the homogeneous and the heterogeneous phase is described, giving 4-and 5-monobromo derivatives whose ratio decreases as the temperature is increased. The same reaction with copper (II) chloride in acetonitrile at 60 produces 5-chloro-2-benzoylpyrrole as the major product. 4, 5- Dihalopyrroles in good yields are obtained with an excess of halogenating agent.
