water; chlorine in dichloromethane T=5 - 10°C; 1 h;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1209227', constants.ctx, '0')">n-butyllithium</a> <br />&nbsp;1.) hexane, THF, -78 deg C, 2.) THF, -78 deg C, 30 min;&nbsp;&nbsp;Yield given. Multistep reaction;&nbsp;<br /> &nbsp;