1: 92 percent / BF3*OEt2 / Ambient temperature 2: 94 percent / NaOMe / methanol / 2 h / Heating 3: 92 percent / SF4 / 24 h / Ambient temperature 4: 96 percent / H2O/KOH / ethanol / 16 h / Ambient temperature 5: 90 percent / diethyl ether; hexane / 2 h / Heating 6: 77 percent / m-chloroperbenzoic acid / CH2Cl2 / 72 h / Ambient temperature 7: 93 percent / NaOMe / methanol / 2 h / Heating 8: 81 percent / SF4 / 24 h / Ambient temperature View Scheme

1: 92 percent / BF3*OEt2 / Ambient temperature 2: 94 percent / NaOMe / methanol / 2 h / Heating View Scheme

1: 92 percent / BF3*OEt2 / Ambient temperature 2: 94 percent / NaOMe / methanol / 2 h / Heating 3: 92 percent / SF4 / 24 h / Ambient temperature 4: 96 percent / H2O/KOH / ethanol / 16 h / Ambient temperature 5: thionyl chloride View Scheme