1: oxalyl chloride / CH2Cl2 / 1 h / Heating 2: diethyl ether / 1.17 h / cooling 3: 2 g / aq. HCl / diethyl ether / 1.5 h / Heating View Scheme

oxalyl dichloride in dichloromethane 1 h; Heating;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '10773376', constants.ctx, '0')">chromium(VI) oxide</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '2037554', constants.ctx, '0')">sulfuric acid</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '635680', constants.ctx, '0')">acetone</a> <br />T=0 - 20&deg;C;&nbsp;<br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 100 percent / H₂ / Pd/C / methanol / 12 h / 2327.17 - 2585.74 Torr<br />2: 63 percent / aq. CrO₃; sulfuric acid / acetone / 0 - 20 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: 80 percent / diethylamine; triphenylphosphine; copper(I) iodide / palladium chloride / 20 &deg;C<br />2: 100 percent / H₂ / Pd/C / methanol / 12 h / 2327.17 - 2585.74 Torr<br />3: 63 percent / aq. CrO₃; sulfuric acid / acetone / 0 - 20 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: palladium diacetate; lithium chloride; anhydrous lithium acetate; tetrabutylammomium bromide / DMFA / 10 h / 60 &deg;C / |Inert atmosphere<br />2: bromine / acetonitrile / 2 h / 0 - 20 &deg;C<br /> <br /> &nbsp;