1: N-methylmorpholine N-oxide, selenium dioxide 2: imidazole / dimethylformamide View Scheme

1: N-methylmorpholine N-oxide, selenium dioxide 2: imidazole / dimethylformamide 3: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H View Scheme

1: N-methylmorpholine N-oxide, selenium dioxide 2: imidazole / dimethylformamide 3: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H 4: anthracene, triethylamine / toluene / 1 h / 20 °C / Irradiation 5: 73 percent / tetrabutylammonium fluoride / tetrahydrofuran / 0.83 h / 60 °C View Scheme

1: N-methylmorpholine N-oxide, selenium dioxide 2: imidazole / dimethylformamide 3: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H 4: anthracene, triethylamine / toluene / 1 h / 20 °C / Irradiation View Scheme

Multi-step reaction with 4 steps 1: 42 percent / imidazole / dimethylformamide / 1.5 h / 20 °C2: 1.) ozone 2.) PPh3 / 1.) CH2Cl2, MeOH, -60 deg C 2.) CH2Cl2, MeOH, -60 to 0 deg C3: NaHCO3 / aq. ethanol / Heating