1: 1.) NaH / 1.) THF, 0 deg C. 30 min, 2.) THF, room temperature, 24 h 2: 54 percent / n-Bu4NOH / methanol / electrolysis, Hg cathode, Pt anode, -2.2 V View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '472690', constants.ctx, '0')">toluene-4-sulfonic acid</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1730800', constants.ctx, '0')">dichloromethane</a> <br />1&nbsp;h;&nbsp;<br /> &nbsp;