1: 1.) magnesium / 1.) diethyl ether, reflux, 4 h, 2.) room temperature, 2 h 2: 68 percent / potassium bisulphate / 20 Torr / Heating; other reagent (85percent phosphoric acid (benzene, reflux, 5 h)) 3: 1.) n-butyllithium / 1.) diethyl ether, hexane, -15 deg C, 1 h, 2.) -15 deg C -> room temperature View Scheme

1: 68 percent / potassium bisulphate / 20 Torr / Heating; other reagent (85percent phosphoric acid (benzene, reflux, 5 h)) 2: 1.) n-butyllithium / 1.) diethyl ether, hexane, -15 deg C, 1 h, 2.) -15 deg C -> room temperature View Scheme

n-butyllithium 1.) diethyl ether, hexane, -15 deg C, 1 h, 2.) -15 deg C -> room temperature; Yield given. Multistep reaction;

2: Al2O3 View Scheme