ammonia; sodium in tetrahydrofuran T=-78°C; 0.75 h; Inert atmosphere;

1: ammonia; sodium / tetrahydrofuran / 0.75 h / -78 °C / |Inert atmosphere 2: pyridine; 4-(N,N-dimethlyamino)pyridine / 12 h / 20 °C View Scheme