1: ethanol / 3 h / 70 °C 2: HCl / H2O / 1.5 h / Heating 3: 1.) acetyl chloride / 1.) 100 degC, 40 min; 2.) CH2Cl2, reflux, 10 min View Scheme

hydrogenchloride; titanium tetraethoxide 1.) EtOH, 70 deg C, 3 h 2.) reflux; Yield given. Multistep reaction;