1: 1.) n-BuLi / 1.) Et2O, hexane, -78 deg C, 1 h, 2.) Et2O, hexane, RT, 12 h 2: 46 percent / Et3N, PPh3, CCl4 / acetonitrile / 1.) RT, 1 h, 2.) reflux, 3 h 3: 62 percent / 1,2-dichloro-benzene / 8 h / Heating 4: 41 percent / 2,3-dichloro-5,6-dicyano-1,4-benzoquinone / benzene / 4 h / Heating 5: 93 percent / 28percent NH4OH / methanol / 48 h / 150 °C 6: 80 percent / sodium bis(2-methoxyethoxy)aluminium hydride / toluene / 0.5 h / Heating View Scheme