sodium dichromate; sulfuric acid; acetic acid in water 2 h; Ambient temperature;

1: Na2Cr2O7*2H2O, conc. AcOH, conc. H2SO4 / H2O / 2 h / Ambient temperature 2: 37 percent / NaBH4 / toluene; methanol / 4 h / Ambient temperature View Scheme

1: Na2Cr2O7*2H2O, conc. AcOH, conc. H2SO4 / H2O / 2 h / Ambient temperature 2: 37 percent / NaBH4 / toluene; methanol / 4 h / Ambient temperature 3: 1 N KOH / methanol / 5 h / 80 °C View Scheme