1: 95 percent / 37 percent aq. HCl, zinc powder / ethanol / 1 h 2: 71 percent / CHCl3 / 5 h / Heating 3: 51 percent / EtONa / ethanol / 3 h / Heating 4: 62 percent / hydrogen / 10 percent Pd/C / acetic acid / Ambient temperature View Scheme

1: 95 percent / 37 percent aq. HCl, zinc powder / ethanol / 1 h 2: 71 percent / CHCl3 / 5 h / Heating 3: 51 percent / EtONa / ethanol / 3 h / Heating View Scheme

1: 95 percent / 37 percent aq. HCl, zinc powder / ethanol / 1 h 2: 71 percent / CHCl3 / 5 h / Heating 3: 51 percent / EtONa / ethanol / 3 h / Heating 4: 73 percent / NaOH / methanol / 10 h / Ambient temperature View Scheme