1: 57.5 percent / mercuric cyanide / benzene; nitromethane / 72 h / Ambient temperature 2: 81.4 percent / M sodium methoxide / methanol / 5 h / Ambient temperature 3: 81.9 percent / zinc chloride / Ambient temperature 4: 78.9 percent / pyridine / 48 h / Ambient temperature 5: 85.5 percent / 60percent aq. acetic acid / 0.67 h / 98 °C 6: sodium methoxide / methanol View Scheme

1: Hg(CN)2 / benzene; nitromethane / 24 h / 40 - 45 °C 2: AcOH / H2O / 1.5 h / 60 - 65 °C View Scheme