1: 85 percent / acetic acid / 0.08 h / 110 °C 2: 94 percent / KOH / ethanol / 50 °C 3: 1) PCl5 / 1) benzene, 30 min, 2) water, 30 deg C, 1 h View Scheme

1: 94 percent / KOH / ethanol / 50 °C 2: 1) PCl5 / 1) benzene, 30 min, 2) water, 30 deg C, 1 h View Scheme

phosphorus pentachloride 1) benzene, 30 min, 2) water, 30 deg C, 1 h; Yield given. Multistep reaction;