1: hydrogenchloride / water / 24 h 2: sodium tetrahydroborate / methanol / 0 °C View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 69 percent / 4.25 h / 160 &deg;C<br />2: POCl₃ / acetonitrile / 3 h / Heating<br /> <br /> &nbsp;