sodium hydroxide; sodium dithionite in 1,4-dioxane; water 3 h; Ambient temperature;

1: 75.4 percent / hydrazine hydrate / ethanol / 12 h / Heating 2: 41.98 percent / acetic acid / 0.5 h / 100 °C 3: 40.1 percent / 24percent sodium hydroxide, sodium dithionite / H2O; dioxane / 3 h / Ambient temperature View Scheme

1: 41.98 percent / acetic acid / 0.5 h / 100 °C 2: 40.1 percent / 24percent sodium hydroxide, sodium dithionite / H2O; dioxane / 3 h / Ambient temperature View Scheme