thionyl chloride in N,N-dimethyl-formamide T=10 - 15°C; 2 h;

1: 75 percent / K2CO3; Cu / dimethylformamide / 48 h / Heating 2: 55 percent / LiAlH4 / tetrahydrofuran / 2 h / Heating 3: 95 percent / SOCl2 / dimethylformamide / 2 h / 10 - 15 °C View Scheme

1: 75 percent / K2CO3; Cu / dimethylformamide / 48 h / Heating 2: 55 percent / LiAlH4 / tetrahydrofuran / 2 h / Heating 3: 95 percent / SOCl2 / dimethylformamide / 2 h / 10 - 15 °C View Scheme

1: 55 percent / LiAlH4 / tetrahydrofuran / 2 h / Heating 2: 95 percent / SOCl2 / dimethylformamide / 2 h / 10 - 15 °C View Scheme