1: 90 percent / NaNO2 / acetic acid; acetic anhydride / 24 h / 20 °C 2: 15 percent / t-BuOK / 2-methyl-propan-2-ol / 20 °C View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 95 percent / SOCl₂ / 8 h / 20 &deg;C<br />2: 30 percent / AgBF₄ / dioxane / 24 h / 100 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: 79 percent / aq. H₃PO₂; NaNO₂ / H₂O / 20 &deg;C<br />2: 95 percent / SOCl₂ / 8 h / 20 &deg;C<br />3: 30 percent / AgBF₄ / dioxane / 24 h / 100 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 4 steps<br /> </b>1: 98 percent / aq. HCl; Br₂ / tetrahydrofuran; H₂O<br />2: 79 percent / aq. H₃PO₂; NaNO₂ / H₂O / 20 &deg;C<br />3: 95 percent / SOCl₂ / 8 h / 20 &deg;C<br />4: 30 percent / AgBF₄ / dioxane / 24 h / 100 &deg;C<br /> <br /> &nbsp;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '11547930', constants.ctx, '0')">silver tetrafluoroborate</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '102551', constants.ctx, '0')">1,4-dioxane</a> <br />T=100&deg;C;&nbsp;24&nbsp;h;&nbsp;<br /> &nbsp;