chromium(VI) oxide; sulfuric acid in water T=0°C; 0.5 h;

<b>Multi-step reaction with 3 steps<br /> </b>1: 84 percent / imidazole / dimethylformamide / 1 h / 0 &deg;C<br />2: 92 percent / OsO₄; NaIO₄ / tetrahydrofuran; H₂O<br />3: 64 percent / tetrabutylammonium fluoride / tetrahydrofuran / 2 h / 20 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 4 steps<br /> </b>1: 91 percent / NaBH₄ / ethanol / 0.5 h / 0 &deg;C<br />2: 84 percent / imidazole / dimethylformamide / 1 h / 0 &deg;C<br />3: 92 percent / OsO₄; NaIO₄ / tetrahydrofuran; H₂O<br />4: 64 percent / tetrabutylammonium fluoride / tetrahydrofuran / 2 h / 20 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 92 percent / OsO₄; NaIO₄ / tetrahydrofuran; H₂O<br />2: 64 percent / tetrabutylammonium fluoride / tetrahydrofuran / 2 h / 20 &deg;C<br /> <br /> &nbsp;