1: 83 percent / KOH / toluene / 4 h / Heating 2: 84 percent / KOH / toluene / 4 h / Heating 3: 1.) NaH / 1.) xylene, reflux, 1 h, 2.) xylene, 150 deg C, 20 h View Scheme

1: 84 percent / KOH / toluene / 4 h / Heating 2: 1.) NaH / 1.) xylene, reflux, 1 h, 2.) xylene, 150 deg C, 20 h View Scheme

sodium hydride 1.) xylene, reflux, 1 h, 2.) xylene, 150 deg C, 20 h; Yield given. Multistep reaction;