magnesium oxide in tetrahydrofuran; water T=40°C; 24 h;

1: 89 percent / magnesium oxide / tetrahydrofuran; H2O / 1 h / Ambient temperature 2: silica gel / CHCl3 / 24 h / Ambient temperature 3: 75 percent / magnesium oxide / tetrahydrofuran; H2O / 24 h / 40 °C View Scheme

1: silica gel / CHCl3 / 24 h / Ambient temperature 2: 75 percent / magnesium oxide / tetrahydrofuran; H2O / 24 h / 40 °C View Scheme