iron in water; acetic acid T=85 - 90°C; 0.75 h;

1: 78 percent / trifluoroacetic acid / 0.5 h / 4 °C 2: 96 percent / K2CO3 / 1,2-dimethoxy-ethane / 24 h / Ambient temperature 3: 1.) 90percent fuming HNO3, CF3SO3H, 2.) aq. 0.2 M K2CO3 / 1.) -20 deg C, 2 h, 2.) ethanol, RT, 15 h 4: 1.) activated Fe, 2.) water / 1.) benzene, reflux, 30 min, 2.) benzene, reflux 5: 1 N aq. HCl / 1.25 h / 75 °C View Scheme