1: 94 percent / 85percent hydrazine hydrate / 10percent Pd/C / ethanol / 50 °C 2: 78 percent / 12 h / 70 °C View Scheme

1: 30 percent / sodium methoxide / methanol / 24 h / Heating 2: 94 percent / 85percent hydrazine hydrate / 10percent Pd/C / ethanol / 50 °C 3: 78 percent / 12 h / 70 °C View Scheme

1: 46.5 percent / 5.5percent HN3 / CHCl3 / 96 h / 120 °C 2: 85 percent / 18 M H2SO4, 13 M HNO3 / 1.5 h / 60 °C 3: 30 percent / sodium methoxide / methanol / 24 h / Heating 4: 94 percent / 85percent hydrazine hydrate / 10percent Pd/C / ethanol / 50 °C 5: 78 percent / 12 h / 70 °C View Scheme

1: 85 percent / 18 M H2SO4, 13 M HNO3 / 1.5 h / 60 °C 2: 30 percent / sodium methoxide / methanol / 24 h / Heating 3: 94 percent / 85percent hydrazine hydrate / 10percent Pd/C / ethanol / 50 °C 4: 78 percent / 12 h / 70 °C View Scheme

T=70°C; 12 h;