1: acetonitrile / 3 h / Ambient temperature; 1 eq. chloramine-B 2: toluene / 6 h / Heating; thermal or base catalysed rearrangement View Scheme

<b>Multi-step reaction with 3 steps<br /> </b>1: 86.1 percent / dimethylformamide / 4 h / 120 &deg;C<br />2: 99.6 percent / diethyl ether / 1 h / Heating<br />3: 69.2 percent / 80percent H₂SO₄ / 0.5 h / 95 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: 86.1 percent / dimethylformamide / 4 h / 120 &deg;C<br />2: 99.6 percent / diethyl ether / 1 h / Heating<br />3: 69.2 percent / 80percent H₂SO₄ / 0.5 h / 95 &deg;C<br /> <br /> &nbsp;