1: 96 percent / K2CO3 / acetone / 18 h / Heating 2: 80 percent / sodium bis(2-methoxyethoxy)aluminum hydride / toluene / 3 h / -20 - 20 °C 3: H2, acetic acid / 5percent Pd/C / 760 Torr / Ambient temperature 4: O2 / 5percent Pd/C / 18 h / Ambient temperature View Scheme