0.25 h; Yield given;

sulfuric acid; sodium cyanide; urea; sodium nitrite 1) water, glacial acetic acid, 15 min; 2) water, 1 h, room temp.; 1 h, 45 deg C; Yield given. Multistep reaction;

1: 0.25 h 2: 12 percent / 10 percent sodium methanolate / methanol / 1 h / Ambient temperature 3: 77 percent / triethylphosphite / 20 h / Heating View Scheme