1: 94 percent / dimethylsulfoxide / 3 h / 70 °C 2: 92 percent / aq. KOH / ethanol / 24 h / Heating View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1209227', constants.ctx, '0')">n-butyllithium</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '102391', constants.ctx, '0')">tetrahydrofuran</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '1730733', constants.ctx, '0')">hexane</a> <br />&nbsp;1.) 0 deg C, 1 h, 2.) 0 deg C to r.t., 12 h;&nbsp;<br /> &nbsp;