iodine T=120°C; 2 h;

iodine Heating;

1: 72 percent / acetic acid; NaNO2 / H2O / 65 °C 2: 67 percent / NH3; sodium dithionite / H2O / 0.17 h / 70 °C 3: 80 percent / pyridine / ethyl acetate / 16 h / 20 °C 4: 90 percent / K2CO3 / dimethylformamide / 16 h / 20 °C 5: (NH2)2SO4 / 16 h / Heating 6: 93 percent / K2CO3 / dimethylformamide / 5 h / 20 °C View Scheme