hydrogen; palladium on activated charcoal in ethanol Ambient temperature;

1: 78 percent / boron trifluoride-ether complex / 6 h / 70 - 80 °C 2: 81 percent / potassium iodide, potassium carbonate / acetone / 18 h / Heating 3: 82 percent / potassium carbonate / acetone / 30 h / Heating 4: 92 percent / hydrogen / palladium-carbon / ethanol / Ambient temperature View Scheme

1: 81 percent / potassium iodide, potassium carbonate / acetone / 18 h / Heating 2: 82 percent / potassium carbonate / acetone / 30 h / Heating 3: 92 percent / hydrogen / palladium-carbon / ethanol / Ambient temperature View Scheme

1: 82 percent / potassium carbonate / acetone / 30 h / Heating 2: 92 percent / hydrogen / palladium-carbon / ethanol / Ambient temperature View Scheme