1: 90 percent / H2 / Pd/C / ethanol / 12 h / 20 °C 2: triethylamine / tetrahydrofuran / -78 - 0 °C 3: 85 percent / LiAlH4 / diethyl ether / 16 h / 40 °C 4: 83 percent / HCl; potassium fluoride / methanol; diethyl ether / 12 h / 20 °C View Scheme