hydrogen; Lindlar's catalyst in tetrahydrofuran; methanol 2 h;

1: 59.3 percent / hydrogen / 10percent palladium on calcium carbonate / tetrahydrofuran; methanol / 2 h 2: 13.7 percent / p-toluenesulfonic acid monohydrate / ethanol / 0.5 h / Heating View Scheme

1: 59.3 percent / hydrogen / 10percent palladium on calcium carbonate / tetrahydrofuran; methanol / 2 h 2: 50.1 percent / p-toluenesulfonic acid monohydrate / ethanol / 0.5 h / Heating View Scheme