hydrogen; palladium on activated charcoal in tetrahydrofuran; methanol P=760 Torr; Heating;

1: 71 percent / 4 N NaOH / dimethylsulfoxide / 1 h / 75 °C 2: 72 percent / H2 / 10percent Pd/C / tetrahydrofuran; methanol / 760 Torr / Heating View Scheme

potassium hydroxide; sodium dithionite in ethanol Heating;