2: 77 percent / 4N HCl / tetrahydrofuran / 3 h / Heating 3: 79 percent / 2,6-lutidine / CH2Cl2 / 1 h / -30 - 0 °C 4: 64 percent / LiCl, DBU / bis(triphenylphosphine)palladium(II) chloride / dimethylformamide / 3 h / 120 °C View Scheme

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