AlCl3, aluminium chloride; aluminum isopropoxide in isopropyl alcohol T=65°C; 12 h;

<b>Multi-step reaction with 4 steps<br /> </b>1: AlCl₃, aluminium chloride / dichloromethane / 0 - 70 &deg;C<br />2: copper(ll) bromide / chloroform; ethyl acetate / 4 h / Reflux<br />3: N-ethyl-N,N-diisopropylamine / acetonitrile / 20 &deg;C<br />4: hydrogenchloride / ethanol; ethyl acetate / 1 h / 20 &deg;C<br /> <br /> &nbsp;