1,2-dichloro-benzene; 2,3-dicyano-5,6-dichloro-p-benzoquinone T=165°C; 48 h;

1: 71 percent / 2,3-dichloro-5,6-dicyano-1,4-benzoquinone, 1,2-dichlorobenzene / 48 h / 165 °C 2: 64 percent / Lawessons reagent, 1,2-dichlorobenzene / 24 h / 160 °C 3: acetonitrile / 70 h / 20 °C / Irradiation View Scheme

1: 71 percent / 2,3-dichloro-5,6-dicyano-1,4-benzoquinone, 1,2-dichlorobenzene / 48 h / 165 °C 2: 64 percent / Lawessons reagent, 1,2-dichlorobenzene / 24 h / 160 °C 3: acetonitrile / 70 h / 20 °C / Irradiation 4: 2N HCl / CH2Cl2 / 0.5 h / 0 °C View Scheme