potassium hydroxide; hydrazine hydrate in various solvent(s) 1) 1 h, 110 deg C, 2) heating;

1: 96 percent / AlCl3 / 4 h / 83 °C 2: 45 percent / conc. H2SO4, FeSO4*7H2O, tBuOOH / 1 h / Ambient temperature 3: 75 percent / KOH, 51percent H4N2 / various solvent(s) / 1) 1 h, 110 deg C, 2) heating View Scheme

1: 45 percent / conc. H2SO4, FeSO4*7H2O, tBuOOH / 1 h / Ambient temperature 2: 75 percent / KOH, 51percent H4N2 / various solvent(s) / 1) 1 h, 110 deg C, 2) heating View Scheme

1: 96 percent / AlCl3 / 4 h / 83 °C 2: 45 percent / conc. H2SO4, FeSO4*7H2O, tBuOOH / 1 h / Ambient temperature 3: 75 percent / KOH, 51percent H4N2 / various solvent(s) / 1) 1 h, 110 deg C, 2) heating View Scheme