1: 84 percent / imidazole / dimethylformamide / 1 h / 0 °C 2: 92 percent / OsO4; NaIO4 / tetrahydrofuran; H2O 3: 64 percent / tetrabutylammonium fluoride / tetrahydrofuran / 2 h / 20 °C 4: 74 percent / CrO3; H2SO4 / H2O / 0.5 h / 0 °C View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '11343078', constants.ctx, '0')">sodium tetrahydroborate</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1718733', constants.ctx, '0')">ethanol</a> <br />T=0&deg;C;&nbsp;0.5&nbsp;h;&nbsp;<br /> &nbsp;