1: 89 percent / HCl / 3.5 h / Heating 2: 57 percent / H2 / Raney-Ni / methanol / 2 h / 45 °C / 760 Torr 3: 43 percent / acetic acid; H2O / 20 °C 4: 58 percent / SOCl2 / CHCl3 / 1.) overnight, 2.) 1 h, 40 deg C View Scheme