[Cu(NO3)(triphenylphosphane)2]; hydrogen; 1,4-di(diphenylphosphino)-butane; sodium hydroxide in ethanol T=50°C; P=37503.8 Torr; 16 h; AutoclaveInert atmosphere; optical yield given as percent dechemoselective reaction;

unter Lichtausschluss;

H2; palladium monocarbide in ethanol

unter Lichtausschluss;