1: 85 percent / NaBH4, NiCl2*6H2O / methanol; tetrahydrofuran / 0.5 h / Ambient temperature 2: 93 percent / aq. NaOH / ethanol / 5 h / Heating View Scheme

sodium tetrahydroborate; nickel dichloride in tetrahydrofuran; methanol 0.5 h; Ambient temperature;