1: 96 percent / ceric ammonium nitrate / acetonitrile; H2O / 0.08 h 2: 79 percent / pyridinium p-toluenesulfonate; dihydro-1,4-benzoquinone / toluene / 3 h / Heating View Scheme

triphenylphosphine; diethylazodicarboxylate in tetrahydrofuran 1 h; Ambient temperature;

With  ammonium cerium(IV) nitrate in  water; acetonitrile 0.0833333 h;