1: borane-tetrahydrofuran complex / acetonitrile / 3 h / 20 °C 2: 78 percent / hydrogen / Pd/C / methanol / 72 h / 114000 Torr View Scheme

<b>Multi-step reaction with 3 steps<br /> </b>1: 88 percent / dimethylformamide / 15 h / 20 &deg;C<br />2: hydrobromic acid; acetic acid<br />3: potassium carbonate<br /> <br /> &nbsp;