hydrogen; palladium on activated charcoal in ethanol P=1520 Torr; 10 h; Ambient temperature;

1: 43 percent / KOH / ethanol / Heating 2: 65 percent / conc. HCl / H2O 3: 98 percent / conc. H2SO4, SOCl2 / 72 h / Heating 4: 83 percent / POCl3 / 0.5 h / Heating 5: 99 percent / Sodium azide / dimethylformamide / 18 h / Ambient temperature 6: 97 percent / H2 / 5percent Pd/C / ethanol / 10 h / 1520 Torr / Ambient temperature View Scheme

1: 99 percent / Sodium azide / dimethylformamide / 18 h / Ambient temperature 2: 97 percent / H2 / 5percent Pd/C / ethanol / 10 h / 1520 Torr / Ambient temperature View Scheme

1: 98 percent / conc. H2SO4, SOCl2 / 72 h / Heating 2: 83 percent / POCl3 / 0.5 h / Heating 3: 99 percent / Sodium azide / dimethylformamide / 18 h / Ambient temperature 4: 97 percent / H2 / 5percent Pd/C / ethanol / 10 h / 1520 Torr / Ambient temperature View Scheme

1: 83 percent / POCl3 / 0.5 h / Heating 2: 99 percent / Sodium azide / dimethylformamide / 18 h / Ambient temperature 3: 97 percent / H2 / 5percent Pd/C / ethanol / 10 h / 1520 Torr / Ambient temperature View Scheme

1: 65 percent / conc. HCl / H2O 2: 98 percent / conc. H2SO4, SOCl2 / 72 h / Heating 3: 83 percent / POCl3 / 0.5 h / Heating 4: 99 percent / Sodium azide / dimethylformamide / 18 h / Ambient temperature 5: 97 percent / H2 / 5percent Pd/C / ethanol / 10 h / 1520 Torr / Ambient temperature View Scheme