sodium hydroxide; sodium tetrahydroborate in 1,4-dioxane 10 h; Ambient temperature;

1: 90 percent / POCl3 / 4 h / 90 °C 2: 85 percent / 98percent N2H4*H2O / 6 h / Heating 3: NaBH4/10percent NaOH / dioxane / 10 h / Ambient temperature View Scheme

1: 75 percent / 98percent N2H4*H2O / ethanol / 10 h / Heating 2: 90 percent / POCl3 / 4 h / 90 °C 3: 85 percent / 98percent N2H4*H2O / 6 h / Heating 4: NaBH4/10percent NaOH / dioxane / 10 h / Ambient temperature View Scheme

1: 85 percent / 98percent N2H4*H2O / 6 h / Heating 2: NaBH4/10percent NaOH / dioxane / 10 h / Ambient temperature View Scheme

5 h; Heating;

5 h; Heating;