Yield given. Multistep reaction;

1: 50 percent / Na2S2O4 / diethyl ether; H2O / 0.5 h / Ambient temperature 2: 66 percent / p-toluenesulfonic acid / CHCl3 / 4 h / Heating View Scheme

1: 50 percent / Na2S2O4 / diethyl ether; H2O / 0.5 h / Ambient temperature 2: 66 percent / p-toluenesulfonic acid / CHCl3 / 4 h / Heating 3: 99 percent / CHCl3 / 48 h / Ambient temperature; in the dark View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 45 percent / d'iodure de sodium / dimethylformamide / 5 h / 60 &deg;C<br />2: 80 percent / nitrate d'ammonium et de cerium / acetonitrile / 0.5 h<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 50 percent / lithium metal, NH₃ (liquid) / tetrahydrofuran / 1 h / -33 &deg;C<br />2: 98 percent / ceric ammonium nitrate, H₂O / acetonitrile / 0.08 h / 25 &deg;C<br /> <br /> &nbsp;