1: 93 percent / H2 / 10percent Pd/C / ethanol / 1.5 h / 2280 Torr / Ambient temperature 3: 89 percent / aq. NaOH / methanol / 2 h / Ambient temperature 4: 25 percent / sodium cyanoborohydride / acetic acid; methanol / Ambient temperature 5: 69 percent / aq. NaOH / methanol / 18 h / Ambient temperature View Scheme

1: 93 percent / H2 / 10percent Pd/C / ethanol / 1.5 h / 2280 Torr / Ambient temperature 3: 89 percent / aq. NaOH / methanol / 2 h / Ambient temperature 4: 12 percent / sodium cyanoborohydride / acetic acid; methanol / Ambient temperature View Scheme

1: 93 percent / H2 / 10percent Pd/C / ethanol / 1.5 h / 2280 Torr / Ambient temperature 3: 89 percent / aq. NaOH / methanol / 2 h / Ambient temperature 4: 25 percent / sodium cyanoborohydride / acetic acid; methanol / Ambient temperature View Scheme