hydrogenchloride; lithium; ethylamine 1.) THF, -70 deg C, 4 h; -70 deg C -> room temperature, 8 h, 2.) 70 deg C, 14 h; Yield given. Multistep reaction;

<b>Multi-step reaction with 5 steps<br /> </b>1: NaOMe / methanol; benzene / Ambient temperature<br />2: LiAlH₄ / tetrahydrofuran / 2 h / Heating<br />3: 97 percent / PPh₃, Br₂ / acetonitrile / 2 h / 0 &deg;C<br />4: 1.) Mg, HgCl₂, 2.) CuCl / 1.) Et₂O, 2.) Et₂O, 0 deg C, 3 h<br />5: 71 percent / n-BuLi / tetrahydrofuran; hexane / 1.) -23 deg C, 1 h, 2.) -23 deg C, 3 h<br /> <br /> &nbsp;