1: 73.1 percent / aq. sodium hydroxide, aq. sodium dithionite / 0.83 h / 23 - 35 °C 2: 90 percent / 0.53 h / 160 - 163 °C 3: 75 percent / sodium hydroxide / Raney Ni / 2-methoxy-ethanol / 1 h / 63 - 68 °C View Scheme

sodium hydroxide; sodium dithionite T=23 - 35°C; 0.833333 h;