1.1: 3-chloro-benzenecarboperoxoic acid / dichloromethane / 2 h 2.1: n-butyllithium / tetrahydrofuran; cyclohexane / 1 h / -78 °C 2.2: 1 h / -78 - 20 °C View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '4546405', constants.ctx, '0')">caesium carbonate</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '605365', constants.ctx, '0')">DMFA</a> <br />T=20&deg;C;&nbsp;<br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: triethylamine / dichloromethane / 3.5 h / 20 &deg;C<br />2: caesium carbonate / N,N-dimethyl-formamide / 20 &deg;C<br /> <br /> &nbsp;