1: 65 percent / diphenyl ether / 30 h / Heating 2: 85.4 percent / 10percent sodium hydroxide / H2O / 1 h / Heating 3: 65.1 percent / dimethylformamide / 4 h / 80 °C 4: 30 percent / hydrogen / 5percent Rh/Al2O3 / acetic acid / 7 h / 50 °C / 3040 Torr 5: 70 percent / 10percent sodium hydroxide / H2O / 1 h / Heating View Scheme

1: 65 percent / diphenyl ether / 30 h / Heating 2: 85.4 percent / 10percent sodium hydroxide / H2O / 1 h / Heating View Scheme