1: NaHCO3 / aq. ethanol / Heating 3: N-methylmorpholine N-oxide, selenium dioxide 4: imidazole / dimethylformamide View Scheme

1: NaHCO3 / aq. ethanol / Heating 3: N-methylmorpholine N-oxide, selenium dioxide 4: imidazole / dimethylformamide 5: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H View Scheme

1: NaHCO3 / aq. ethanol / Heating 3: N-methylmorpholine N-oxide, selenium dioxide 4: imidazole / dimethylformamide 5: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H 6: anthracene, triethylamine / toluene / 1 h / 20 °C / Irradiation 7: 73 percent / tetrabutylammonium fluoride / tetrahydrofuran / 0.83 h / 60 °C View Scheme

1: NaHCO3 / aq. ethanol / Heating 3: N-methylmorpholine N-oxide, selenium dioxide 4: imidazole / dimethylformamide 5: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H 6: anthracene, triethylamine / toluene / 1 h / 20 °C / Irradiation View Scheme