1: 85 percent / K2CO3 / dimethylformamide / 80 °C 2: 70 percent / LiAlH4 / tetrahydrofuran / Ambient temperature View Scheme

<b>Multi-step reaction with 5 steps<br /> </b>1: boron trifluoride etherate / 1 h / Heating<br />2: perchloric acid / 2 h / Ambient temperature<br />3: 6 N HCl / 2 h / 60 &deg;C<br />4: t-BuOK, ammonia / 1 h / -33 &deg;C / Irradiation<br />5: boron trifluoride etherate / 1 h / Heating<br /> <br /> &nbsp;