1: 87 percent / N-iodosuccinimide, NaHCO3 / benzene / 8 h / 35 °C / Irradiation 2: 65 percent / CrO3, H2SO4 / H2O / -78 - 25 °C View Scheme

1: chlorodicarbonyl(1-(isopropylamino)-2,3,4,5-tetraphenylcyclopentadienyl) ruthenium(II); Candida antarctica CAL-B lipase; potassium tert-butylate; potassium carbonate 2: methanol; potassium carbonate / 1 h 3: 1H-imidazole 4: methanol; pyridinium p-toluenesulfonate / 6 h / 20 °C View Scheme