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

1: 80 percent 2: 91 percent / conc. H2SO4, FeSO4*7H2O, tButOOH / 1 h / Ambient temperature 3: 65 percent / KOH, 51percent H4N2 / various solvent(s) / 1) 1 h, 110 deg C, 2) heating View Scheme

1: 91 percent / conc. H2SO4, FeSO4*7H2O, tButOOH / 1 h / Ambient temperature 2: 65 percent / KOH, 51percent H4N2 / various solvent(s) / 1) 1 h, 110 deg C, 2) heating View Scheme