1: 84 percent / NH2NH2*H2O, KOH / ethane-1,2-diol / 3 h / 240 °C 2: 62 percent / conc. aq. HCl / ethanol / 4.5 h / 80 °C View Scheme

1: With hydrazine hydrate in ethylene glycol T=100°C; Wolff-Kishner reduction; 1 h; 2: With potassium hydroxide T=240°C;