1: 98 percent / g. NH3 / ethanol / 24 h / 160 °C 2: 95 percent / methylhydrazine / ethanol / 80 h / 100 °C View Scheme

1: 3.5 percent / KNO3; H2SO4 / 4 h / 0 - 10 °C 2: 53 percent / arsenic pentoxide; H2SO4 / 2 h / 150 °C 3: 98 percent / NH3 / ethanol / 22 h / 160 °C 4: 90 percent / H2 / Pd/C / ethanol / 3.5 h / 20 - 25 °C / 2280 Torr View Scheme

1: 87 percent / H2SO4 / 2 h / 100 °C 2: 53 percent / arsenic pentoxide; H2SO4 / 2 h / 150 °C 3: 98 percent / NH3 / ethanol / 22 h / 160 °C 4: 90 percent / H2 / Pd/C / ethanol / 3.5 h / 20 - 25 °C / 2280 Torr View Scheme

1: 53 percent / arsenic pentoxide; H2SO4 / 2 h / 150 °C 2: 98 percent / NH3 / ethanol / 22 h / 160 °C 3: 90 percent / H2 / Pd/C / ethanol / 3.5 h / 20 - 25 °C / 2280 Torr View Scheme

1: 8 percent / arsenic pentoxide; H2SO4 / 2 h / 150 °C 2: 90 percent / H2 / Pd/C / ethanol / 3.5 h / 20 - 25 °C / 2280 Torr View Scheme