1: 70 percent / DDQ / benzene / 4 h / Heating 2: 84 percent / anhydrous potassium carbonate / acetone / 6 h / Heating View Scheme

potassium hydroxide in N,N-dimethyl-formamide T=50 - 55°C; 6 h;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '4122947', constants.ctx, '0')">copper</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1364620', constants.ctx, '0')">diphenylether</a> <br />3&nbsp;h;&nbsp;&nbsp;Heating;&nbsp;<br /> &nbsp;