1: 91 percent / acetic anhydride / 1 h / 70 °C 2: 92 percent / NaIO4 / H2O; methanol / 16 h / Ambient temperature 3: 1.) TFAA, 2.) BF3*Et2O / 1.) benzene, RT, 1 h, 2.) benzene, RT, 1 h 4: 80 percent / NaBH4, NiCl2*6H2O / methanol; tetrahydrofuran / 0.5 h / Ambient temperature 5: 98 percent / LiAlH4 / tetrahydrofuran / 2 h / Heating View Scheme

1: 91 percent / acetic anhydride / 1 h / 70 °C 2: 92 percent / NaIO4 / H2O; methanol / 16 h / Ambient temperature 3: 1.) TFAA, 2.) BF3*Et2O / 1.) benzene, RT, 1 h, 2.) benzene, RT, 1 h 4: 80 percent / NaBH4, NiCl2*6H2O / methanol; tetrahydrofuran / 0.5 h / Ambient temperature 5: 94 percent / 10percent aq. NaOH / ethanol / Ambient temperature View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: AcOH / ethanol / 18 h / Heating<br />2: NaBH₄ / methanol / 1 h / Ambient temperature<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: p-TsOH / benzene / Heating<br />2: NaBH₄ / methanol / 2 h / Ambient temperature<br /> <br /> &nbsp;