1: KOH / ethanol; H2O / 6 h / Heating 2: 74 percent / acetic anhydride / 3 h / Heating 3: 2.) acetic anhydride / 1.) benzene, 1 h, reflux; 2.) 5 h, reflux 4: lithium aluminium hydride View Scheme

1: KOH / ethanol; H2O / 6 h / Heating 2: 74 percent / acetic anhydride / 3 h / Heating 3: 2.) acetic anhydride / 1.) benzene, 1 h, reflux; 2.) 5 h, reflux 4: 94 percent / boron tribromide / CH2Cl2 / 2 h / Ambient temperature 5: 77 percent / potassium carbonate / dimethylformamide 6: 78 percent / LiAlH4 / tetrahydrofuran / Heating 7: 85 percent / H2 / 10percent Pd-C / acetic acid View Scheme