1: 45.7 percent / AcONa / 120 h / Heating 2: 96.5 percent / H2SO4 / acetic acid / 2.5 h / Heating 3: 96.8 percent / K2CO3 / acetone / 7 h / Heating 4: 57.6 percent / CsF / various solvent(s) / 3 h / 190 - 195 °C / Heating 5: 1.) (CF3CO)2O, 30percent aq. H2O2, 2.) NaIO4, 3.) 1percent aq NaHCO3 View Scheme