aluminium trichloride in benzene T=20°C; 4 h;

<b>Multi-step reaction with 2 steps<br /> </b>1: toluene / Heating<br />2: 82 percent / Cu(OAc)2; Et₃N / CH₂Cl₂ / 72 h / 20 &deg;C<br /> <br /> &nbsp;