1: 95 percent / K2CO3 / dimethylformamide / 2 h / 25 °C 2: 1) K2CO3, 2) 1 M NaOH / 1) DMSO, 25 deg C, 10 min, 2) DMSO, H2O, 25 deg C, 1 h 3: 78 percent / NaBH4 / ethanol / 3 h / 5 - 25 °C 4: 30 percent Chromat. / O2, Rose Bengal / acetonitrile / 13 °C / Irradiation 5: 96 percent / K2CO3 / dimethylformamide / 2 h / 25 °C View Scheme

1: 95 percent / K2CO3 / dimethylformamide / 2 h / 25 °C 2: 1) K2CO3, 2) 1 M NaOH / 1) DMSO, 25 deg C, 10 min, 2) DMSO, H2O, 25 deg C, 1 h 3: 78 percent / NaBH4 / ethanol / 3 h / 5 - 25 °C 4: 30 percent Chromat. / O2, Rose Bengal / acetonitrile / 13 °C / Irradiation 5: 96 percent / K2CO3 / dimethylformamide / 2 h / 25 °C 6: 52 percent / CuBr2 / ethyl acetate 7: 92 percent / K2CO3 / dimethylformamide / 2 h / 25 °C 8: 90 percent / K2CO3 / dimethylsulfoxide / 0.17 h / 25 °C 9: O2, Rose Bengal / acetonitrile / 13 °C / Irradiation View Scheme

1: NaI / ethanol / Heating 2: BaCO3 / aq. ethanol / Heating 3: H2 / Pd-C / ethanol View Scheme