chromium(VI) oxide; lithium; ethylenediamine 1.) 20 min, 2.) ) pyridine, 1h; Yield given. Multistep reaction;

<b>Multi-step reaction with 3 steps<br /> </b>1: 72 percent / NH₂NH₂*H₂O, KOH / ethane-1,2-diol / 1.) 140 deg C, 5 h, 2.) 210 deg C, 10 h<br />2: 62 percent / p-TsOH / acetone / 12 h / Heating<br />3: 96 percent / pyridine / 1.) boiling water-bath, 2 h, 2.) room temperature, overnight<br /> <br /> &nbsp;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '103233', constants.ctx, '0')">pyridine</a> <br />&nbsp;1.) boiling water-bath, 2 h, 2.) room temperature, overnight;&nbsp;<br /> &nbsp;