hydrogen; palladium on activated charcoal in ethanol T=25°C; P=760 Torr; 0.25 h;

1: 86 percent / 1 N aq. NaOH, benzyltri-n-butylammonium bromide / CH2Cl2 / 2 h / Ambient temperature 2: 72.5 percent / 1.5 h / 250 °C 3: 66 percent / H2 / 10percent Pd/C / ethanol / 0.25 h / 25 °C / 760 Torr View Scheme

1: 72.5 percent / 1.5 h / 250 °C 2: 66 percent / H2 / 10percent Pd/C / ethanol / 0.25 h / 25 °C / 760 Torr View Scheme