1: FeCl3*6H2O, activated carbon, hydrazine hydrate / CH2Cl2 / 30 h 2: 68 percent / ethanol / 1.) 50 deg C, 12 h, 2.) reflux, 12 h 3: 85 percent / sodium methoxide / methanol / 12 h / 105 °C 4: 91 percent / triethylamine / CH2Cl2 / 0.5 h / 0 - 5 °C 5: methanol / 4 h / 105 °C View Scheme

1: 68 percent / ethanol / 1.) 50 deg C, 12 h, 2.) reflux, 12 h 2: 85 percent / sodium methoxide / methanol / 12 h / 105 °C 3: 91 percent / triethylamine / CH2Cl2 / 0.5 h / 0 - 5 °C 4: methanol / 4 h / 105 °C View Scheme

1: 85 percent / sodium methoxide / methanol / 12 h / 105 °C 2: 91 percent / triethylamine / CH2Cl2 / 0.5 h / 0 - 5 °C 3: methanol / 4 h / 105 °C View Scheme

1: 91 percent / triethylamine / CH2Cl2 / 0.5 h / 0 - 5 °C 2: methanol / 4 h / 105 °C View Scheme

1: 82 percent / dimethylformamide / 6 h / 65 °C 2: FeCl3*6H2O, activated carbon, hydrazine hydrate / CH2Cl2 / 30 h 3: 68 percent / ethanol / 1.) 50 deg C, 12 h, 2.) reflux, 12 h 4: 85 percent / sodium methoxide / methanol / 12 h / 105 °C 5: 91 percent / triethylamine / CH2Cl2 / 0.5 h / 0 - 5 °C 6: methanol / 4 h / 105 °C View Scheme

1: 82 percent / dimethylformamide / 6 h / 65 °C 2: FeCl3*6H2O, activated carbon, hydrazine hydrate / CH2Cl2 / 30 h 3: 68 percent / ethanol / 1.) 50 deg C, 12 h, 2.) reflux, 12 h 4: 85 percent / sodium methoxide / methanol / 12 h / 105 °C 5: 91 percent / triethylamine / CH2Cl2 / 0.5 h / 0 - 5 °C 6: methanol / 4 h / 105 °C View Scheme

in methanol T=105°C; 4 h;