1: 88.1 percent / toluene; H2O / pH 4 2: 95.6 percent / H2 / Pd/C / H2O 3: 68.8 percent / toluene; H2O / pH 4 4: 85.3 percent / H2 / Pd/C / H2O 5: toluene; H2O / pH 4 View Scheme

sodium hydroxide in water; toluene Ambient temperature;