nucleophilic bromination at the C5-position of tryptophol and tryptamine derivatives is difficult and remains unexplored. Herein, we report a tunable water-mediated electrooxidative protocol for the dearomative C3/C5-bromocyclization of tryptophol and tryptamine derivatives. This electrosynthetic approach enables selective construction of cyclic 3a- or 5a-bromoindolines simply by the addition of different