A selective bromination of aromatic amines

Abstract
A simple method for monobromination of aromatic amines predominantly or exclusively in the para-position is reported. 2,4,4,6-Tetrabromocyclohexa-2,5-dienone is used as the halogenating agent in dichloromethane or chloroform. Protection of the amino-group is not necessary and yields are generally higher than 90%.

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