sulfuric acid 24 h; Heating;

<b>Multi-step reaction with 2 steps<br /> </b>1: CH₂Cl₂ / 12 h / 25 &deg;C<br />2: 1.) n-BuLi / 1.) THF, 0 deg C, 0.5 h, 2.) THF<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: SOCl₂ / 3 h / Heating<br />2: CH₂Cl₂ / 12 h / 25 &deg;C<br />3: 1.) n-BuLi / 1.) THF, 0 deg C, 0.5 h, 2.) THF<br /> <br /> &nbsp;