1.1: dihydrogen peroxide / 1,1,1-trifluoropropanone / dichloromethane; acetonitrile; water / 2 h / 20 °C / aqueous K2C03 / EDTA-Na2 buffer 2.1: Cu(BF4)2*xH2O / dichloromethane / 2 h / 20 °C 3.1: ethanol / 1 h / 20 °C 3.2: 72 h / 110 °C View Scheme