1: 85 percent / p-TsOH / toluene / 8 h / Heating 2: 85 percent / dimethylethylene urea; t-BuOK / Heating View Scheme

&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1718733', constants.ctx, '0')">ethanol</a> <br />4&nbsp;h;&nbsp;&nbsp;Heating;&nbsp;<br /> &nbsp;