hydrogen; RhH(CO)(triphenylphosphine)3 in benzene T=100°C; P=60004.8 Torr; 6 h;

1: 87 percent / p-toluenesulfonic acid / 4 h / Heating 2: 90 percent / diethyl ether / 10 h / 10 - 15 °C 3: 54 percent / sodium borohydride / H2O / 0.5 h / Ambient temperature 4: 30 percent / hydrogen / PtO2 / methanol / 1 h / 2068.6 Torr / Ambient temperature 5: 60 percent / 10percent aq. sulfuric acid / 7 h / Ambient temperature View Scheme

1: 90 percent / diethyl ether / 10 h / 10 - 15 °C 2: 54 percent / sodium borohydride / H2O / 0.5 h / Ambient temperature 3: 30 percent / hydrogen / PtO2 / methanol / 1 h / 2068.6 Torr / Ambient temperature 4: 60 percent / 10percent aq. sulfuric acid / 7 h / Ambient temperature View Scheme

1: 54 percent / sodium borohydride / H2O / 0.5 h / Ambient temperature 2: 30 percent / hydrogen / PtO2 / methanol / 1 h / 2068.6 Torr / Ambient temperature 3: 60 percent / 10percent aq. sulfuric acid / 7 h / Ambient temperature View Scheme

1: 30 percent / hydrogen / PtO2 / methanol / 1 h / 2068.6 Torr / Ambient temperature 2: 60 percent / 10percent aq. sulfuric acid / 7 h / Ambient temperature View Scheme