1: 83 percent / H2SO4 / benzene / 36 h / Heating 2: 59 percent / LAH / diethyl ether; tetrahydrofuran / 48 h / Heating 3: 48percent HBr, H2SO4 / 24 h / Heating 4: 1.) NaOEt / 1.) EtOH, reflux, 15 min, 2.) EtOH, reflux, 24 h 5: 78 percent / KOH / ethanol / 2 h / Heating 6: 85 percent / 1 h / 200 °C 7: SOCl2 / CH2Cl2 / 24 h / Heating View Scheme

acetyl chloride