1: 88 percent / 2N HNO3 / H2O / pH = 2-3 2: 77 percent / sodium-amalgan / methanol; H2O / 22 h / Ambient temperature 3: 1) 5percent sodium nitrite, 2) 2N H2SO4 / 1) 2N H2SO4, 50 deg C, 5 min, 2) 1 h, reflux View Scheme

methanol T=40 - 45°C; 96 h;

1: 1) 5percent sodium nitrite / 1) 2N H2SO4, 50 deg C, 2) 2N H2SO4, 2 h, reflux 2: 850 mg / 15percent H2O2 / 80 °C 3: 110 mg / potassium chromate / 70 °C 4: 23 mg / methanol / 96 h / 40 - 45 °C View Scheme

1: sodium-amalgan 2: 1) 5percent sodium nitrite / 1) 2N H2SO4, 50 deg C, 2) 2N H2SO4, 2 h, reflux 3: 850 mg / 15percent H2O2 / 80 °C 4: 110 mg / potassium chromate / 70 °C 5: 23 mg / methanol / 96 h / 40 - 45 °C View Scheme

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