1: CrO3; acetic acid 2: HCl View Scheme

hydrogenchloride

triethylamine; tris-(o-tolyl)phosphine; palladium diacetate in acetonitrile T=120°C; P=22800 Torr; 24 h;

1: 52 percent / tri-o-tolylphosphine, triethylamine / palladium(II) acetate / acetonitrile / 24 h / 120 °C / 22800 Torr 2: 78 percent / oxygen / palladium(II) chloride, copper(I) chloride / 1,2-dimethoxy-ethane / 24 h / 50 - 60 °C 3: 1.) H2, 2.) aq. HCl / 10percent rhodium-carbon / 1.) ethanol, room temperature, 1 atmosphere, 3 h, 2.) room temperature, 3 h View Scheme