in 1,4-dioxane; water

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '4267587', constants.ctx, '0')">potassium carbonate</a> <br />&nbsp;1.) 2-butanone, reflux, 30 min, 2.) reflux, 3 h;&nbsp;&nbsp;Yield given. Multistep reaction;&nbsp;<br /> &nbsp;