1: 62 percent / Zn / acetic acid / 1 h / Ambient temperature 2: 82 percent / NaBH4 / H2O; methanol / Ambient temperature 3: 45 percent / 1.) KOH; 2.) 2M HCl / 1.) aq. EtOH, reflux, 12 h View Scheme

1: zinc, acetic acid / 2 h 2: 92 percent / H2, conc. H2SO4 / 5percent palladium on carbon / acetic acid / 4 h / 2585.7 Torr 3: 86 percent / 3 N aq. HCl / 18 h / Heating View Scheme