trifluoroacetic anhydride T=0 - 20°C; 5 h;

1: 71 percent / CH2Cl2 / 1.5 h 2: 0.38 g / aq. ammonium persulfate / 1 h / Heating View Scheme

1: 81 percent / 10 percent F2-N2 / acetonitrile; H2O / 3 h / -40 °C 2: 24 percent / aq. KOH View Scheme

1.1: acetic acid; dihydrogen peroxide / 24 h / |Reflux 2.1: N,N-dimethylcarbamoyl chloride / dichloromethane / |Inert atmosphere 3.1: water; potassium hydroxide / 4 h / |Reflux 4.1: sulfuric acid / water / 16 h / |Reflux 5.1: sodium tetrahydroborate / ethanol / 48 h / 20 °C / |Inert atmosphere 5.2: 1 h / |Inert atmosphere View Scheme

potassium hydroxide

(NH4)2S2O8 1 h; Heating; Yields of byproduct given;

potassium permanganate in water T=0 - 20°C; 1.5 h;

manganese(IV) oxide in chloroform Heating / reflux;