N-chloro-succinimide; trifluorormethanesulfonic acid; palladium diacetate in 1,2-dichloro-ethane T=20°C; 10 h; Sealed tube; regioselective reaction;

1: palladium diacetate; trifluorormethanesulfonic acid; N-bromosuccinmide / 1,2-dichloro-ethane / 6 h / 20 °C / |Sealed tube 2: hydrazine hydrate / 12 h / 20 °C / |Sealed tube View Scheme

1: N-chloro-succinimide; palladium diacetate; trifluorormethanesulfonic acid / 1,2-dichloro-ethane / 10 h / 20 °C / |Sealed tube 2: hydrazine hydrate / 2 h / 60 °C / |Sealed tube View Scheme