1: hydrogenchloride; water / 1 h 2: potassium carbonate / water / 16.75 h / 20 °C View Scheme

<b>Multi-step reaction with 5 steps<br /> </b>1: Et₃N / diethyl ether<br />2: NaN₃ / ethanol / Heating<br />3: 80 percent / CrO₃; aq. H₂SO₄ / acetone<br />4: 100 percent / H₂ / Pd/C / ethanol<br />5: 36 percent / aq. NaOH / tetrahydrofuran<br /> <br /> &nbsp;