sodium hydride in tetrahydrofuran 1 h; Heating;

1: 1.) BuLi / 1.) THF, -78 deg C, 10 min, 2.) -78 deg C -> room temperature 2: 83 percent / NaH / tetrahydrofuran / 1 h / Heating View Scheme

1: 88 percent / TsOH / benzene / 24 h / Heating 2: 1.) BuLi / 1.) THF, -78 deg C, 10 min, 2.) -78 deg C -> room temperature 3: 83 percent / NaH / tetrahydrofuran / 1 h / Heating View Scheme

1: 1.) BuLi / 1.) THF, -78 deg C, 10 min, 2.) -78 deg C -> room temperature 2: 83 percent / NaH / tetrahydrofuran / 1 h / Heating View Scheme

1: 12 percent / NaH / tetrahydrofuran / 1 h / Heating 2: 1.) BuLi / 1.) THF, -78 deg C, 10 min, 2.) -78 deg C -> room temperature 3: 83 percent / NaH / tetrahydrofuran / 1 h / Heating View Scheme