jones reagent in acetone 0.0833333 h;

1: 92 percent / 1 N aq. NaOH, 30percent aq. H2O2 / methanol / 1 h / Ambient temperature 2: 80 percent / 1,2-bis(diphenylphosphino)ethane / tetrakis(triphenylphosphine)palladium(0) / toluene / 60 h / 140 °C View Scheme