1.1: NaNO2; aq. HCl; NH3 / NaHCO3 / 0.17 h / 0 - 5 °C 1.2: 60 percent / CuCl; aq. HCl 2.1: n-BuLi / tetrahydrofuran; hexane / 4 h / -60 °C 2.2: 60 percent / hexane; tetrahydrofuran / 20 °C View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 40 percent / HNO₃; H₂SO₄ / CH₂Cl₂ / 1 h / 100 &deg;C<br />2: Fe; aq. HCl / ethanol / 1 h / Heating<br /> <br /> &nbsp;