1: sodium tungstate; dihydrogen peroxide / tetrahydrofuran; water / 0.5 h / 20 °C 2: tert.-butylhydroperoxide; C3H7O(1-)*C34H32N2O4(2-)*V(3+) / dichloromethane; water / 72 h / 0 °C 3: N,N-dimethyl-formamide / 10 h / 20 °C 4: sodium hydride / N,N-dimethyl-formamide / 1 h / 20 °C 5: triethylamine / dichloromethane / 2 h / 0 - 20 °C 6: 1,8-diazabicyclo[5.4.0]undec-7-ene / toluene / 8 h / 90 °C 7: potassium hydroxide / methanol; water / 1 h / Reflux; Inert atmosphere 8: palladium 10 on activated carbon; formic acid / methanol / 10 h / 20 °C / Inert atmosphere 9: hydrogenchloride / water; isopropyl alcohol / 16 h / 50 - 70 °C 10: nonafluoro-n-butanesulfonyl fluoride; triethylamine tris(hydrogen fluoride); triethylamine / tetrahydrofuran / 12 h / 20 °C 11: sodium acetate / water; isopropyl alcohol / 3 h / pH 5 / Reflux View Scheme

sodium tungstate; dihydrogen peroxide in tetrahydrofuran; water T=20°C; 0.5 h;