1: 1.22 g / Sodium borohydride / tetrahydrofuran; H2O / 2 h / Ambient temperature 2: HCl / acetic acid; tetrahydrofuran; H2O / 3 h View Scheme

<b>Multi-step reaction with 5 steps<br /> </b>1: 88 percent / pyridine / Ambient temperature<br />2: 94 percent / imidazole / dimethylformamide<br />3: 96 percent / K₂CO₃ / methanol / 3 h / Ambient temperature<br />4: 96 percent / oxalyl chloride, Et₃N, DMSO / -76 deg C to 0 deg C<br />5: 7 percent / sodium bis(trimethylsilyl)amide / tetrahydrofuran / -76 deg C to 0 deg C<br /> <br /> &nbsp;