1: With diisobutylaluminium hydride in toluene T=-70°C; 2.5 h; 2: With L-(+)-tartaric acid in water; isopropyl alcohol; toluene T=20°C; 1 h;

1: 83 percent / aq. K2CO3; conc. H2O2 / ethanol / 14 h / 20 °C 2: 71 percent / bis(trifluoroacetoxy)iodobenzene / acetonitrile; H2O / 24 h / 20 °C View Scheme