sodium iodide in acetone T=50°C; 12 h; Yield given;

<b>Multi-step reaction with 2 steps<br /> </b>1: p-toluenesulfonic acid / acetone; tetrahydrofuran / 1.5 h / 20 &deg;C<br />2: pyridine / 20 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1.1: toluene-4-sulfonic acid / tetrahydrofuran / 20 &deg;C<br />1.2: 20 &deg;C<br />2.1: 4-(N,N-dimethlyamino)pyridine; triethylamine / dichloromethane / 0 - 20 &deg;C<br /> <br /> &nbsp;