1: 97 percent / NaIO4 / H2O; methanol / 16 h / Ambient temperature 2: 99 percent / TFAA, BF3*OEt2 / benzene / 1 h / Ambient temperature 3: 76 percent / NaBH4, NiCl2*6H2O / methanol; tetrahydrofuran / 0.5 h / Ambient temperature 4: 86 percent / 10 percent NaOH / H2O; ethanol / 1.5 h / Heating View Scheme