1: 1.) NH2NH2*H2O, KOH, 2.) SOCl2 / 1.) triethyleneglycol, 120 deg C, 2 h, 195 deg C, 4 h, 2.) CH2Cl2, reflux, 2 h 2: AlCl3 / CS2 / 65 h 3: 0.38 g / 50percent HNO3 / 8 h / 200 °C 4: dioxane; diethyl ether View Scheme

1: 1.) NH2NH2*H2O, KOH, 2.) SOCl2 / 1.) triethyleneglycol, 120 deg C, 2 h, 195 deg C, 4 h, 2.) CH2Cl2, reflux, 2 h 2: AlCl3 / CS2 / 65 h 3: 0.38 g / 50percent HNO3 / 8 h / 200 °C View Scheme