sodium sulfide; oxygen in ethanol T=80°C; 2 h; Yield given;

sodium sulfide; oxygen in ethanol T=25°C; 1 h;

1: potassium nitrate / H2O; acetonitrile / 8 h / 15 - 20 °C 2: 85 percent / sodium sulfide, atmospheric oxygen / aq. ethanol / 1 h / 25 °C View Scheme

1: 90 percent / potassium bichromate, potassium permanganate / H2O; acetonitrile; nitromethane / 10 h / Ambient temperature 2: 85 percent / sodium sulfide, atmospheric oxygen / aq. ethanol / 1 h / 25 °C View Scheme

sodium sulfide; oxygen in ethanol T=45°C; Yield given;