1: 57 percent / oxalic acid; silica gel 2: 93 percent / AcOH; AcONH4; air / 1.5 h / Heating View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1708400', constants.ctx, '0')">2,2'-azo-bisisobutyronitrile</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '3587329', constants.ctx, '0')">tri-n-butyl-tin hydride</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '635760', constants.ctx, '0')">toluene</a> <br />2.5&nbsp;h;&nbsp;&nbsp;Heating;&nbsp;<br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 83 percent / 2,6-lutidine; dilauroyl peroxide / cyclohexane / Heating<br />2: 92 percent / Bu₃SnH; AIBN / toluene / 2.5 h / Heating<br /> <br /> &nbsp;

<b>Multi-step reaction with 5 steps<br /> </b>1: 54 percent / ethanol / 4 h / Heating<br />2: 54 percent / p-TsOH / toluene / 8 h / Heating<br />3: 54 percent / dimethylethylene urea; t-BuOK / toluene / Heating<br />4: 83 percent / 2,6-lutidine; dilauroyl peroxide / cyclohexane / Heating<br />5: 92 percent / Bu₃SnH; AIBN / toluene / 2.5 h / Heating<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: 89 percent / acetone / 20 &deg;C<br />2: 83 percent / 2,6-lutidine; dilauroyl peroxide / cyclohexane / Heating<br />3: 92 percent / Bu₃SnH; AIBN / toluene / 2.5 h / Heating<br /> <br /> &nbsp;