sodium dithionite; N-benzyl-N,N,N-triethylammonium chloride; sodium carbonate 1.) ethanol-water 2.) ethanol-water, 45 deg C, 5h; Yield given. Multistep reaction;

Dowex 1-X8 anion exchange resin in ethanol; water

&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1718733', constants.ctx, '0')">ethanol</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '635760', constants.ctx, '0')">toluene</a> <br />72&nbsp;h;&nbsp;&nbsp;Heating;&nbsp;<br /> &nbsp;