N-bromosuccinmide in N,N-dimethyl-formamide T=20°C; 12 h; Inert atmosphere;

1.1: potassium tert-butylate / tetrahydrofuran / 1 h / |Inert atmosphere; |Schlenk technique 1.2: 12 h / 66 °C / |Inert atmosphere; |Schlenk technique 2.1: N-bromosuccinmide / N,N-dimethyl-formamide / 12 h / 20 °C / |Inert atmosphere View Scheme

1.1: potassium tert-butylate / tetrahydrofuran / 1 h / |Inert atmosphere; |Schlenk technique 1.2: 12 h / 66 °C / |Inert atmosphere; |Schlenk technique 2.1: N-bromosuccinmide / N,N-dimethyl-formamide / 12 h / 20 °C / |Inert atmosphere View Scheme