in water; dimethyl sulfoxide T=140°C; 40 h;

1: 67 percent / HCl(g) / 144 h / 20 °C 2: 1.) glacial acetic acid, 2.) 5 N HCl / 1.) 100 deg C, 2 h, 2.) 100 deg C, 30 min 3: 52 percent / acetic anhydride, nitric acid / 0.25 h / 100 °C 4: 114 mg / 1,2-dimethoxy-ethane; diethyl ether / 1 h 5: 7.5 percent / H2O; dimethylsulfoxide / 40 h / 140 °C View Scheme

1: 1.) glacial acetic acid, 2.) 5 N HCl / 1.) 100 deg C, 2 h, 2.) 100 deg C, 30 min 2: 52 percent / acetic anhydride, nitric acid / 0.25 h / 100 °C 3: 114 mg / 1,2-dimethoxy-ethane; diethyl ether / 1 h 4: 7.5 percent / H2O; dimethylsulfoxide / 40 h / 140 °C View Scheme