1: Ni, Cu, Cr, Na2SO4/SiO2, H2 / 380 - 400 °C 2: 47 percent / K2CO3 / CuCl, Cu / pyridine / 10 h / 210 - 220 °C View Scheme

tetrabutylammomium bromide; oxygen; palladium diacetate in dimethyl sulfoxide; toluene T=90°C; P=760.051 Torr; 12 h; Schlenk techniqueMolecular sieveInert atmosphere; Reagent/catalystSolvent;