1: 95 percent / 2,3-dichloro-5,6-dicyano-1,4-benzoquinone / acetic acid; H2O / 4 h / Heating 2: 86 percent / hydrazine; KOH / bis-(2-hydroxy-ethyl) ether / 22 h / 20 - 165 °C View Scheme

2,3-dicyano-5,6-dichloro-p-benzoquinone in water; acetic acid 4 h; Heating;

1: 95 percent / 2,3-dichloro-5,6-dicyano-1,4-benzoquinone / acetic acid; H2O / 4 h / Heating 2: 86 percent / hydrazine; KOH / bis-(2-hydroxy-ethyl) ether / 22 h / 20 - 165 °C 3: 98 percent / BBr3 / CH2Cl2 / 2 h / Heating View Scheme

1: (saponification) 2: HBr View Scheme

(saponification);