1: Pd/C; ammonium formate / tetrahydrofuran; methanol / 20 °C 2: LiOH / H2O View Scheme

<b>Multi-step reaction with 3 steps<br /> </b>1.1: 70 percent / NaNO₂; NaBr / aq. H₂SO₄ / 7 h / 0 - 20 &deg;C<br />2.1: 79 percent / conc. H₂SO₄ / 1 h / Heating<br />3.1: Zn; dibromoethane / various solvent(s) / 0.25 h / 20 &deg;C<br />3.2: 66 percent / various solvent(s) / 1.5 h / 20 &deg;C<br /> <br /> &nbsp;