2,3-dicyano-5,6-dichloro-p-benzoquinone in benzene 2.5 h; Heating;

With  potassium hydroxide; hydrazine hydrate in  diethylene glycol 6 h;  Heating;   

With  potassium hydroxide; hydrazine hydrate in  diethylene glycol 6 h;  Heating;   

Multi-step reaction with 4 steps 1: 82 percent / AlCl3 / CS2 / 6 h / 0 °C2: 100 percent / NaBH4 / ethanol; H2O / 20 h / Ambient temperature3: 71 percent / p-toluenesulfonic acid / benzene / 2 h / Heating4: 70 percent / hydrazine monohydrate, KOH / bis-(2-hydroxy-ethyl) ether / 6 h / Heating