1: CH2Cl2; toluene / 46 h / Ambient temperature 2: 80 percent / NiCl2*6H2O, NaBH4 / tetrahydrofuran; H2O / 0.42 h / Ambient temperature 3: 96 percent / 2N aq. NaOH, EtOH / 14 h / 100 °C View Scheme