chromium(VI) oxide; sulfuric acid in acetone

1: 57.2 percent / NaH / dimethylsulfoxide / 12 h / Ambient temperature 2: 82 percent / 1.) BH3; 2.) <O>; 3: 60 percent / reagent Jones / acetone View Scheme

1: 82 percent / 1.) BH3; 2.) <O>; 2: 60 percent / reagent Jones / acetone View Scheme

1: 92 percent / 55percent NaH / dimethylformamide / 16 h / Ambient temperature 2: 1.) 1M BH3, 2.) 10percent aq. NaOH, 30percent aq. H2O2 / 1.) THF, room temp., 3 h, 2.) THF, H2O, room temp., 1 h 3: 2.08 g / CrO3 / acetone / 1 h / Ambient temperature View Scheme