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

sodium methylate in methanol 2 h; Heating;

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