1: Jones reagent / acetone / 2.5 h / 0 - 5 °C 2: 73 percent / 80percent hydrazine hydrate, KOH / various solvent(s) / 1.) 110-120 deg C, 1 h, 2.) 190-200 deg C, 3 h 3: 94 percent / AlBr3 / CS2 / 5 h / Ambient temperature View Scheme